ActivityWatch is an app that automatically tracks how you spend time on your devices.

It is open source, privacy-first, cross-platform, and a great alternative to services like RescueTime, ManicTime, and WakaTime.

It can be used to keep track of your productivity, time spent on different projects, bad screen habits, or just to understand how you spend your time.

A simple, fast and free app to remove unnecessary files from your computer.

Features

• Written in memory-safe Rust - almost 100% unsafe code free
• Amazingly fast - due to using more or less advanced algorithms and multithreading
• Free, Open Source without ads
• Cache support - second and further scans should be much faster than the first one
• CLI frontend - for easy automation
• GUI frontend
• No spying - Czkawka does not have access to the Internet, nor does it collect any user information or statistics
• Multilingual - support multiple languages like Polish, English or Italian

Multiple tools to use:

• Duplicates - Finds duplicates based on file name, size or hash
  Empty Folders - Finds empty folders with the help of an advanced algorithm
• Big Files - Finds the provided number of the biggest files in given location
• Empty Files - Looks for empty files across the drive
• Temporary Files - Finds temporary files
• Similar Images - Finds images which are not exactly the same (different resolution, watermarks)
• Similar Videos - Looks for visually similar videos
• Same Music - Searches for similar music by tags or by reading content and comparing it
• Invalid Symbolic Links - Shows symbolic links which point to non-existent files/directories
• Broken Files - Finds files that are invalid or corrupted
• Bad Extensions - Lists files whose content not match with their extension

Postal is a complete and fully featured mail delivery platform for use by websites & web servers. Think Sendgrid, Mailgun or Postmark but open source and ready for you to run on your own servers.

Picocrypt NG (new generation) is a very small (hence Pico), very simple, yet very secure encryption tool that you can use to protect your files.

It's designed to be the go-to tool for file encryption, with a focus on security, simplicity, and reliability.

Picocrypt NG uses the secure XChaCha20 cipher and the Argon2id key derivation function to provide a high level of security.