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blitzbrowser/blitzbrowser is an open-source Docker container for deploying headful browser fleets via CDP. Supports Puppeteer, Playwright, and any CDP framework with session persistence and proxy support. Apache 2.0 licensed; no longer actively maintained.

jubalh/awesome-os is a curated list of open-source operating systems and learning resources with 2,239 GitHub stars. It collects hobby kernels, production OSes, books, tutorials, and Linux-specific development tools for developers studying or building operating systems.

poloclub/transformer-explainer runs live GPT-2 in your browser with interactive visualization of every internal operation. Built by Georgia Tech researchers, MIT licensed, 8.2k stars.

Extract editable text from screenshots, scanned documents, photos, and receipts with a free online OCR tool. No uploads, no signup, and it works in your browser.

lackeyjb/playwright-skill is a Claude Code Skill that enables autonomous Playwright browser automation through natural language prompts. MIT-licensed with 2,920 GitHub stars, it generates custom automation code on demand with visible browser execution.

The-Complete-FAANG-Preparation is a 12,029-star open-source repository consolidating DSA sheets, technical subjects, and competitive programming archives across 18 platforms for comprehensive software engineering interview preparation.

mlcourse.ai is an open Machine Learning course by OpenDataScience, led by Yury Kashnitsky. It offers 10 weeks of self-paced learning from Pandas to gradient boosting, with Kaggle competitions, multilingual content, and optional bonus assignments.

Pydoll is a Python library for stealth browser automation via direct Chrome DevTools Protocol connection, eliminating WebDriver detection vectors with humanized interactions and structured Pydantic-based extraction.

zsviczian/obsidian-excalidraw-plugin integrates Excalidraw sketching into Obsidian with 7,317 stars. TypeScript-based, AGPL v3.0 licensed. Features bidirectional linking, LaTeX, script automation, and markdown-native storage for visual knowledge work.

serengil/deepface is a lightweight Python library wrapping 10+ state-of-the-art face recognition models. It provides one-line APIs for verification, identification, attribute analysis, and real-time streaming, with 23,112 GitHub stars and active maintenance through 2026.

finit-project/finit is a fast, MIT-licensed Linux init system written in C. Designed for embedded and small systems, it offers a lightweight alternative to systemd and SysV init with proven Buildroot, Alpine, and Debian integrations.

accomplish-ai/openwork (Coworker) is an open-source AI desktop agent with 10,901 GitHub stars that automates file management, document creation, and browser tasks using local LLMs or your own API keys. MIT licensed, TypeScript-based, runs on macOS, Windows, and Linux.

Train your memory, focus and IQ with 36 free browser games — reaction time, N-Back, Sudoku, Raven matrices, card counting and more. No sign-up, no downloads, zero cost.

Combine multiple PDFs into a single document for free, right in your browser. Reorder files, merge hundreds of pages, and keep your documents private.

geo-tp/ESP32-Bus-Pirate is open-source firmware that transforms ESP32-S3 boards into a multi-protocol hardware hacking tool with 24 operational modes, web-based CLI, and wireless capabilities. MIT licensed, 4,323 GitHub stars.

fosrl/pangolin is an open-source, identity-aware remote access platform built on WireGuard that combines VPN tunneling with reverse proxy capabilities. With 21,733 GitHub stars, it enables secure browser-based and client-based access to distributed infrastructure without traditional VPN limitations.

Stop bleeding money on subscriptions. These 12 free AI tools deliver the same power as premium software. One creator saved $6,000 a year switching to these alternatives.

Compare the best invoicing software for freelancers in 2026. FreshBooks vs Wave vs Zoho Invoice — pricing, features, and expert recommendations.