Optimizing the Nethack 4.3 Save System (2014)
nethack4.org
nethack4.org
(also: just noticed this post is from 2014!)
For the general turn based roguelike games check out caves of qud. It has its flaws but is incredibly interesting.
Cogmind comes to mind as being a neat riff off of the "hack" style of roguelikes, and the developer is super open and cool about the game. Or, for a little bit of an older but a much broader experience, you could check out Dungeons of Dredmor.
(As you mentioned--Jupiter Hell just came out and it's the sequel to DoomRL and it's awesome, if you like more coffeebreak-style roguelikes!)