Open source. Open possibilities.

A curated list of computer science courses with video lectures, covering algorithms, AI, databases, operating systems, and more.

Obtainium is an Android application that allows users to install and update apps directly from their original release pages, providing notifications for new versions.

An advanced, system-level personal security and anti-coercion suite for Android. Running as a systemless priv-app with LSPosed hooks, it provides duress PINs, hardware tripwires, and remote SMS control.

KeePassXC is a cross-platform, open-source password manager that stores usernames, passwords, URLs, attachments, and notes in an offline encrypted KDBX database. It offers password generation, TOTP, auto-type, browser integration, and a CLI.

Curated knowledge repository of SRE practices, tools, and culture from leading tech organizations including Airbnb, Netflix, Google, and many others.

Vigil is a modern, cross-platform password manager built with Electron and React, featuring full compatibility with KeePass (.kdbx) databases.

GridSnap is a Tauri v2 desktop app that keeps SSH commands, credentials, API keys and notes in an encrypted spreadsheet-like grid. It offers global hotkey access, per-sheet and per-cell masking, optional AES-256-GCM vault and per-sheet passwords, system tray integration and 11 themes.

Official repository of the OWASP Cheat Sheet Series, a flagship OWASP project offering concise, high-value guidance on specific application security topics for developers building and securing applications.

Tuta Mail is a secure email service featuring built-in end-to-end encryption for communications across multiple devices.

Passbolt is a security-first, open-source password manager designed for teams to securely centralize, organize, and share passwords and secrets.