Recommended software for ICCF play? I am interested in playing correspondence chess online through the ICCF. It is my understanding that using computers is not only allowed, but almost mandatory. My question is: What all kinds of software are needed to be successful, and what are the best software packages to use in each category? I know you need an engine, a database, and some kind of analysis program, but which ones are best? I'd be interested in hearing about both freeware as well as commercial programs.

Thanks for any help!
Chris =)
The best engine to use for analysis is most likely stockfish. Works with multiple procs, probably the strongest tactically. And as a bonus, it's free (but you should get a good UCI. I use Fritz UCI which is ok. An UCI that shows multiple lines of analysis at the same time is kinda mandatory). Imo using  an engine in correspondance chess is only interesting if you're strong enough to understand easily why the program makes the choices he makes. ie 2000+ fide at least. You will also notice some of their evaluation function flaws : for instance overvaluing lines which win a pawn but give opposite color bishops, for stockfish. Also sometimes giving more value to prophylactic moves than line opening moves, when in fact it's better to go for the lines opening immediately (it doesn't always realize how strong it can be because of horizons effects).