I noticed "The Ultimate FOSS Guide for Android" was very out of date and thought I'd try to make a new version with more current suggestions. But after a while I realized most of the time I was just copying off PrivacyGuides.org which has a pretty robust set of FOSS offerings with an unsurprising focus on privacy.
There are still some things it doesn't cover like Android launchers and keyboards, but we could have an additional sidebar post with more a la carte suggestions.
Thoughts? 
Privacy guides tends to be pretty good in terms of suggestions, and they don't take ads of any kind, so I say: Yes! I think the sidebar post is a good idea as well, to cover the gaps left behind by Privacy Guides.