I don't have any plans to release the source code at this time. Basically I use SadConsole to render and build menus, and Roguesharp to do all the fiddly work I didn't want to write myself (FoV, probability/rolling, ICell). The bigger stuff like map generation, game systems, saving, and content I created myself. For what it's worth, I moved into using SadConsole very early into development. The creator of that library is very friendly and can probably answer any questions you have about it. He actually posted in this comment section below!
If you have more specific questions, I might be able to help. Thanks for checking out the game.