FTLDNS and Unbound Combined For Your Own All-Around DNS Solution
Android app: https://f-droid.org/packages/info.varden.hauk/
Hauk is a fully open source, self-hosted location sharing service. Install the backend code on a PHP-compatible web server, install the companion app on your phone, and you're good to go!
Diablo build for modern operating systems
Completely reverse engineered game source available online for any platform.
Nintendo Switch port: https://github.com/lantus/devilution-nx
Turtl lets you take notes, bookmark websites, and store documents for sensitive projects. From sharing passwords with your coworkers to tracking research on an article you're writing, Turtl keeps it all safe from everyone but you and those you share with.
Joplin is a free, open source note taking and to-do application, which can handle a large number of notes organised into notebooks. The notes are searchable, can be copied, tagged and modified either from the applications directly or from your own text editor. The notes are in Markdown format.
μlogger [micro-logger] is an android application for continuous logging of location coordinates, designed to record hiking, biking tracks and other outdoor activities. Application works in background. Track points are saved at chosen intervals and may be uploaded to dedicated server in real time. This client works with μlogger web server. Together they make a complete self owned and controlled client–server solution.
Rclone is a command line program to sync files and directories to and from cloud services.
Crypt is the encryption feature of rclone.