Indeed but what about when your skills set don't involve software developpement? What's interesting in this question is actually that what work for FOSS might b

Indeed but what about when your skills set don't involve software developpement? What's interesting in this question is actually that what work for FOSS might be working for other tasks. Like for instance à project like "let's develop together a good blueprint for a eco-neutral house" where architects/carpenters/engineers/electrician/phd/lawyer/mason/painter/layman/etc could contribute in a Git Like fashion.