Just a side note on Anki - it sounds cool, but how is it possible that there are zero screenshots on the product page? Furthermore, it has a super busy (/intimidating-to-non-techies) download section, and the only real descriptive text is on the linked docs/help site, which is so dense that it is completely overwhelming to anybody who is still in "convince me" mode.
The project would probably have 10x the number of users in 6 months if they learned how to do product marketing.