OKRs.app - Reach your personal goals with OKRs
TiddlyMap - An interactive concept- and mind-mapping plugin for the personal note-taking software TiddlyWiki based on the Vis.js library. It's free and open-source!
Simple OKR - Track, measure and manage OKRs
Wisdomap - Wisdomap Medicine is a study aid that helps medical students create differential diagnoses and suitable management plans from a presenting complaint and structured revision notes.
Focus - New Tab page that gives you a moment of calm and inspires you to be more productive.
IOctopus - IOctopus is an online mind map service for a dive deep into the mind for the best ideas.