Top CHECKER GitHub Repositories & Tools (2026)

Offline, privacy-first grammar checker. Fast, open-source, Rust-powered

Get Android app updates straight from the source.

Open firmware for the Echo Show 5, 1st and 2nd gen: Alpine Linux instead of Android, no Alexa. A local Home Assistant voice satellite with its own touch screen, on-device wake word, SSH and A/B over-the-air updates.

The best IP Toolbox. Check your IP address & geolocation, test IP for WebRTC and DNS IP leaks, run an IP quality check, browser fingerprint check, website availability check, network speed test, global latency test, MTR test, Whois search, and more.

TypeScript is a superset of JavaScript that compiles to clean JavaScript output.

A fast type checker and language server for Python

Style and Grammar Checker for 25+ Languages

Self-hosted Speed Test for HTML5 and more. Easy setup, examples, configurable, mobile friendly. Supports PHP, Node, Multiple servers, and more

Super-fast/easy runtime validators and serializers via transformation

Keep your containers up-to-date!

State-of-the-Art Source Code Plagiarism & Collusion Detection. Check for plagiarism in a set of programs.

Static type checker for Ruby

Fast proxy scraper and checker written in Rust. Collects HTTP, SOCKS4 and SOCKS5 proxies from any number of sources, verifies each one really works, and writes JSON and plain text with response time, exit IP, ASN and geolocation. Single binary for Windows, Linux, macOS and Android, with an interactive TUI.

A high-performance proxy rotation engine with automated IP management and real-time health monitoring

JS type check (TypeScript supported) functions like `isPlainObject() isArray()` etc. A simple & small integration.

Multi-chain crypto wallet risk scanner for AML/KYT screening. Scores addresses 0–100 using sanctions, risky contracts and fund tracing. Integrates 6 intelligence providers with failover, detects scams, hacks, mixers and phishing, supports 15+ chains, batch screening and TXT/JSON/CSV/HTML/PDF reports. Python, cross-platform.

Kuvasz (pronounce as [ˈkuvɒs]) is an open-source uptime and SSL monitoring service, with multiple notification channels, status pages, IAC support via YAML, Prometheus integration, a complete REST API and many more!