Open Source Kotlin Build Tools for Mac

v2flyNG is a mobile client that packages the V2Ray/V2Fly networking core into an Android application with a touch-friendly UI. It focuses on making modern protocols—such as VMess, VLESS, and Trojan—accessible without requiring shell access or manual config editing. Profiles can be added via subscription links or QR codes, and the app merges and updates them on schedule to keep node lists fresh. Per-app proxy controls allow you to include or exclude specific applications, which is useful for balancing privacy with bandwidth and latency. The client exposes routing controls, TLS settings, custom DNS, and UDP handling so advanced users can fine-tune behavior. Status panels and logs help diagnose connectivity issues and confirm that rules are being applied as intended.

Amper is an open-source data collection and metric reporting agent developed by JetBrains as part of their internal analytics and telemetry infrastructure for IntelliJ-based products. Its purpose is to gather usage statistics, performance metrics, error reports, and other diagnostic signals from IDE installations in a privacy-conscious way to help product teams understand real-world usage patterns and improve quality. Designed to be lightweight and efficient, Amper runs as a background service that batches and securely transmits anonymous data back to analytics pipelines while respecting user privacy settings and opt-outs. The architecture focuses on extensibility so that developers can define new metric types, customize triggers, and enrich events with context without adding overhead to the IDE. Data collected by Amper feeds dashboards and experimentation systems that guide design decisions, prioritize feature improvements, and monitor the impact of releases over time.