Avernum: Escape From The Pit on Android is an excellent port.
The game is wonderful, one of my favorite recent RPGs that I've played. I love the rewarding exploration. To say there are interesting things around every corner would be an understatement - the whole game is an interesting thing.
Would have liked to see a different style of character development, though. I don't mind putting points in character stats, but the skill tree is a bit underwhelming. I really don't care much for skill trees in RPGs to begin with.
I would have liked to have seen more non-combat skills as well. Fix those things and you literally have a near-flawless RPG, at least for me it would be.
I think the writing is great, too. The game is just very interesting and keeps you wanting to explore more and more, which is the mark of a great game, in my book.