Friendica is also nice and looks like 2008ish Twitter but not so full, sadly. For reference if anyone interested:

• Public Servers/Instances List
• Friendica Instances Statistics

Aww, that’s a pity that the fossdroid one is no longer available, I couldn’t find any in regards to general FOSS apps regardless of which app store you have, but I’ll give the fdroid a try, thanks!