Mars Colonies - A free old-school RTS... on Mars
Idea Crunch - Successful business ideas not yet launched in your country
HACKTIKA - Fill your Growth Idea Backlog by the Best Growth Hackers
Pain In My Butt - Crowdsourced business ideas
OpenMCT by NASA - A web based mission control framework
NicheGenerator.nyz - A funny solution to start with people, not ideas or products.