Heraia is not dead !
develLately I've been focusing on prime numbers and translated a python program into a C implementation to have some speed-up. I rediscovered that I love coding in C :-) and guess what... heraia is coded in C (79 % according to ohloh).
So I coded a bit on heraia and managed to make it compile with either gtk+2 and libgtkhex-0 or gtk+3 and libgtkhex-3. There is still some use of deprecated functions for gtk+3 and I have to do something about thoses functions but it seems that heraia is working fine under Debian 7 (Wheezy) with gtk+3 and libgtkhex-3.
Have a try with your system and let me know about it (try the latest subversion revision) !