It's in the interest of the open-source community to make open-source development as profitable as possible. One potential means of making money from open source is crowdfunding, [but] proprietary vendors aren't likely to be enthusastic about using their flagship product to try out a relatively untested business model. Crowdfunding the open source release of legacy technologies of historical significance could provide a low-risk way for vendors to experiment with making money by crowdfunding: The product has already turned them a profit.
With that, I'd like to ask Slashdot readers, what would you pay to see open sourced?
Slashdot reader jonwil
left a comment suggesting old games
("where the game is no longer being developed/worked on and where the engine/tech is no longer being used for anything"). But the sky's the limit here, so leave your own best answers in the comments. What would you pay to see open sourced?