I have outed myself previously as not a big Minecraft fan, so take everything in this post with a grain of salt (as I obviously don't really understand that genre).
Anyways... recently this sub-reddit for open-source games was pointed out in our forums, and while it isn't really as lively as others (for example the Linux gaming one) it pointed out an new project called Iceball:
|Pre-alpha Iceball screenshot|
Now maybe the graphics are lacking on purpose (see disclaimer above), but I couldn't help to think: why for f***'s sake did they have to reinvent the wheel with their own engine instead of using for example Terasology:
Or Minetest, or the Ardorcraft API for that matter???
Ahh well, at least it made me aware that Terasology is still very much under development, and with its focus on DungeonKeeper & Dwarf-Fortress elements, it might actually become a game I would play (and doesn't make my eyes bleed :p ).
Speaking of which... the guy behind AgentKeeper released yet another nice video and graphics are constantly further improved as seen here.