itch.io - An online game marketplace and community.
Mightytext - Send & Receive SMS Text Messages from your computer. Sync'd with your Android #
GOG.com - DRM-free game store, selling both new and old titles. No clients required.
Zeplin - Collaboration app for UI designers & frontend developers
GnuPlot - Gnuplot is a portable command-line driven interactive data and function plotting utility.
Abstract - A secure, version-controlled hub for your design files