Open Source Text Editors
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Browse free open source Text Editors and projects for Mobile Operating Systems and Mac below. Use the toggles on the left to filter open source Text Editors by OS, license, language, programming language, and project status.
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Build Agents and Models on One PlatformGemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
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Veeam Data Platform v13.1Try Veeam Data Platform today. Experience the unified platform that's secure by design, portable by default, and proven to recover clean, fast, and anywhere.
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QPrompt
Personal teleprompter software for all video makers.
Free teleprompter software for all video creators. Built with ease of use, fast performance, control accuracy, and cross-platform support in mind. QPrompt works with studio teleprompters and tablet teleprompters, cellphones, and webcams. It was also designed for use in video conferences. -
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HarfBuzz
Open source text shaping engine
HarfBuzz is an open source text-shaping engine with a C API that turns fonts and strings of character codes into a form that is correctly arranged for the corresponding language and writing system. This is essentially the process of text shaping: translating a string of character codes into a properly arranged sequence of glyphs that can be rendered onto a screen or into final output form for inclusion in a document. This shaping depends on a number of factors: the input string, the active font, the script (or writing system) of the string, and the string's language. Various font formats have their own set of standard text-shaping rules. With Harfbuzz, you can properly shape all the major writing systems. HarfBuzz is cross-platform and supports all major software platforms and font formats. -
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Standard Notes App
Think fearlessly with end-to-end encrypted notes and files
Standard Notes is a free, secure note-taking app with powerful end-to-end encryption, unparalleled privacy features, and seamless cross-platform syncing on unlimited devices. Standard Notes is a secure digital notes app that protects your notes and files with audited, industry-leading end-to-end encryption. Only you have access to the keys required to decrypt your data. Write and store all your notes and files in one secure place and seamlessly access them across all your devices. Note-taking services like Evernote, Google Keep, Notion, and Simplenote cannot prevent employees and governments from reading your data. Standard Notes features advanced security and privacy controls that protect your data against hacks, data breaches, government access, and even employee access. -
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Simplenote for Electron
Simplenote for Web, Windows, and Linux
A Simplenote React client packaged in Electron. All your notes, synced on all your devices. Get Simplenote now for iOS, Android, Mac, Windows, Linux, or in your browser. Notes stay updated across all your devices, automatically and in real-time. There’s no “sync” button, It just works. Add tags to find notes quickly with instant searching. Share a to-do list, post some instructions, or publish your notes online. Notes are backed up with every change, so you can see what you noted last week or last month. Write, preview, and publish your notes in Markdown format. Apps, backups, syncing, sharing, it’s all completely free. Download Simplenote for any device and stay in sync, all the time, everywhere. -
PRTG Catches Network Issues Before They Cause DowntimeReactive troubleshooting usually means hearing about a problem from frustrated users, not your monitoring tool. PRTG sets threshold-based alerts across devices, servers and applications, notifying your team by email, SMS or push the moment a metric crosses a set limit. That means catching a failing disk or overloaded server before it becomes an outage and getting time back from firefighting. Start a free trial and set your first alerts today.
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Mozc
Mozc - a Japanese Input Method Editor designed for multi-platform
Mozc is an open source Japanese Input Method Editor (IME) developed by Google, designed to provide Japanese text input across multiple operating systems including Android, macOS, Windows, GNU/Linux, and Chromium OS. The project originated as a subset of Google Japanese Input, released publicly under the BSD 3-Clause license for community use and development. Mozc offers core IME functionality such as text conversion, prediction, and dictionary-based input, enabling users to efficiently type and edit Japanese text. While Mozc shares much of its codebase with Google’s internal IME, it operates as an independent open source project without official support, guarantees, or stable release cycles. Developers can build Mozc from source for their preferred platform, and the repository includes detailed build instructions for Android, Linux, macOS, and Windows environments. -
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Translate Shell
Command-line translator using Google Translate, Bing Translator, etc.
Translate Shell (formerly Google Translate CLI) is a command-line translator powered by Google Translate (default), Bing Translator, Yandex.Translate, and Apertium. It gives you easy access to one of these translation engines in your terminal. By default, translations with detailed explanations are shown. You can also translate the text briefly (only the most relevant translation will be shown). Translate Shell can also be used like an interactive shell; input the text to be translated line by line. Translate Shell is known to work on many POSIX-compliant systems. You may use Translate Shell from any Unix shell of your choice (bash, zsh, ksh, tcsh, fish, etc.); however, the wrapper script requires either bash or zsh installed. It is a must to have corresponding fonts for the language(s) / script(s) you wish to display in your terminal. -
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VisualMathEditor
LaTeX, AscciMath and MathML editor developed in Javascript and HTML
Visual Math Editor New Version “ It now offers more than 730 LaTeX symbols and 210 AsciiMath symbols. It now works in all modern browsers without plugin. It now works with LaTeX, AsciiMath, MathML and HTML syntaxes. It improves the ergonomics of the user interface.” VisualMathEditor is a LaTeX, AsciiMath and MathML editor developed in Javascript and HTML. It operates independently on the web or locally. It has many features and menus that help the equation-entry and allow their posting and backup. Formulas : - math physics symbols - operation symbols - logical symbols - arrows symbols - relation symbols - bracket symbols - differential symbols - functions symbols - integral symbols - matrix symbols - sqrt & frac symbols - sub & sup symbols - sum & prod symbols - greek characters -
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kodeWeave
HTML/CSS/JS and Markdown Playground For Web Designers and Developers
kodeWeave is a realtime coding playground for HTML, CSS and Javascript. Similar to JSFiddle and JSBin, but kodeWeave was made to work offline but also as a prototyping application to build applications for desktop operating systems while on mobile devices. (PhoneGap Build is recommended for mobile devices) kodeWeave similar to jsfiddle, jsbin, dabblet, liveweave, codepen, cssdeck, cssdesk, tinkerbin, d3 playground, plunker and pastebin, but allows you to export your web app as a desktop and/or chrome application. -
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This project is now hosted on https://mined.github.io and will be co-hosted here until further notice. Text editor with extensive Unicode and CJK support. Convenient and efficient features for editing of plain text documents, programs, HTML etc. User-friendly interface, mouse control and menus. Runs in a text-mode environment like xterm or mintty.
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Go from Code to Production URL in SecondsSkip the Kubernetes configs. Cloud Run handles HTTPS, scaling, and infrastructure automatically. Two million requests free per month.
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DOCX Document Converter
Convert .docx to .md/.txt and .html. Free, unlimited, fast.
A simple, free, unlimited, secure web-based tool that converts Microsoft Word documents (.docx) into Markdown (.md/.txt) and HTML files. Perfect for developers, writers, and anyone who needs to transform .docx MS Office Word documents into web-friendly or AI context friendly formats. Unlike those other jerks on the web that charge many dollars per month for this, I made it free, unlimited and open source. This is a better version of 'convert docx to txt' since .md files can be opened in notepad++ just the same AND they preserve formatting too! Meanwhile HTML files will even embed images allowing you to view them just like they were in the original document. -
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General information, and a pack of tools for manipulating the Persian (Farsi) language and script, on different platforms and operating systems.
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Verti-Horiz Text File Merger
Web app to merge multiple TXT files vertically or horizontally
# Verti-Horiz Text File Merger An offline standalone web app to merge TXT files vertically or append them horizontally. ## Vertical Stacking The Vertical Merger combines multiple text files into one, joining them one after another in alphabetical filename order. ## Horizontal Append The Horizontal Appender combines two text files line by line, merging corresponding lines from each file. This program is free, open source, private and offline. All operations happen locally on your computer, simply using your browser, no data is sent anywhere. Works via any modern web browser, so you can use it on any operating system. Win, mac, linux, android, etc. -
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bibelot.pl is a Perl script that formats and converts text documents into compressed PalmDoc .pdb files, suitable for reading on a Palm or Handspring device with any standard PalmDoc reader (AportisDoc, CSpotRun, RichReader, TealDoc, etc.)
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溫度日記 Hearty Journal
療癒系心情日記 App
Hearty Journal is a beautiful diary and personal journal application with a focus on privacy. Securely record your thoughts, feelings, ideas and private moments with the ease of writing on a pad of paper. Its aesthetic looks like a piece of notebook paper with handwritten words on it. Also, beautiful themes, lovely journal stickers and luxury fonts are available in the app. Hearty Journal works on both your computer and phone (Windows, macOS, iOS and Android are supported). Moreover, to keep your memories safe, entries will be encrypted synced to the cloud for backup. A sanctuary for your mind and soul, Hearty Journal will help pour your feelings/brain dump, increase your positive energy, be more grateful and a calmer mind by building healthy thinking through journaling. -
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Boostnote is an open source note-taking app for programmers. Apps available for Mac, Windows, Linux, Android and iOS. Built with Electron, React + Redux, Webpack and CSSModules.
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Text Line Duplicate Remover
Remove duplicate lines from your text
This standalone offline web browser tool helps you remove duplicate lines from your text, with additional text processing options. Simply open it in your browser by double-clicking the html file. It also includes the source code too. I made this when I was working with long lists of entries and needed something to automatically clean them up. As a bonus you can also change the Sentence Case of the text, make it lowercase, UPPERCASE or Sentence case. -
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CleanTexttools
Open-source browser-based utility for removing markdown artifacts, hid
CleanTextTools Core is the open-source edition of CleanTextTools, a browser-based utility for cleaning text generated by ChatGPT, Claude, Gemini and other AI assistants. The Core edition helps users remove common formatting artifacts while preserving the original wording and meaning of their content. Core features include: * Remove common markdown formatting * Fix inconsistent spacing and line breaks * Remove hidden Unicode characters * Remove emojis * Copy cleaned text * Process text directly in the browser * Run locally without creating an account CleanTextTools Core is intended for developers, writers, students, marketers and professionals who need clean, paste-ready text for documents, emails, websites and productivity platforms. This SourceForge project contains the limited open-source Core edition. The complete hosted product, including additional cleaning options and platform-specific tools, is available at CleanTextTools.com. -
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Consilium Sentence Suggestions Tools
Consilium – User Defined sentence Suggestion Tool.
There are many tools available in market which will provide spell correction or grammer correction while making documents, but very few tools are available which are providing sentence completion according to previously entered text. But this all are providing sentence complition suggestion for sentences which are oftenly or regularly used by all people in same manner. But in reality style of writing changes person to person. While our aim is to provide a sentence suggestion tool which will give suggestion to complete the sentence according previously enterd data by the user. Output or suggestion for same sentence or word will change person to person according to previously entered data by that person. So, it will be very easy to type any document, sms, mail, chatting etc. -
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Draft.js
React framework for building text editors
Draft.js is a framework for building rich text editors in React, powered by an immutable model and abstracting over cross-browser differences. Draft.js allows you to build any type of rich text input, whether you're only looking to support a few inline text styles or building a complex text editor for composing long-form articles. We provide the building blocks to enable the creation of a broad variety of rich text composition experiences, from basic text styles to embedded media. Draft.js fits seamlessly into React applications, abstracting away the details of rendering, selection, and input behavior with a familiar declarative API. The Draft.js model is built with immutable-js, offering an API with functional state updates and aggressively leveraging data persistence for scalable memory usage. -
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Hitor
History text
Hitor is a history recorder and text editor. It is a simple and easy tool for human beings on the earth to fast finish daily text work. -
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If you've read Jef Raskin's book "The Humane Interface" and wanted to see how some of those ideas work in practice, or improve on them, join us here. See http://humane.sourceforge.net for more information.
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Markdown Editor With WYSIWYG Controls
An Easy to use Browser Based MarkDown Editor With Live Preview Panel
Browser Based, Cross Platform, Supporting all Operating Systems, Easy Application. No need to remember any markdown syntax anymore. Just Select Your Text and Click on any of the Buttons Above ( Except for some buttons ). See the Below Screenshot for Details. Notes: This editor has been tested fully on the Firefox Web Browser and is quite successful. -
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MaterialEditText
EditText in Material Design
AppCompat v21 makes it easy to use Material Design EditText in our apps, but it's so limited. If you've tried that, you know what I mean. So I wrote MaterialEditText, the EditText in Material Design, with more features that Google Material Design Spec has introduced. Base color will be used as bottom line color, text color (reset alpha to 87%) and hint text color (reset alpha to 26%). You can use app:met_baseColor in xml or setBaseColor() in java code. If you haven't set a base color, black will be used. Primary color will be used as the activated bottom line color, highlight floating label color, and singleline ellipsis color. You can use app:met_primaryColor in xml or setPrimaryColor() in java code. If you haven't set a primary color, the base color will be used. Just use com.rengwuxian.materialedittext.MaterialEditText instead of EditText in your layout xml. MaterialEditText has directly inherited EditText, so you don't have to change your java code. -
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NotePuppy is a minimalist text editor with file management capabilities. First developed for the Nokia N900, I wanted an editor that looked good and was slick and easy to use. It is so useful as a desktop editor that it is one of my main work tools.
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