Compiler???
You'll prolly get lots of different answers, but I prefer AC Basic from
Absoft.
It's Amigabasic compatible (I think there may be a keyword or two missing,
but can't remember what it is and have never run into it) and is also about
90%+ compatible with QuickBasic on the PC. AND Absoft also wrote the
Microsoft Basic Compiler for the MAC.
All in all, it's a very good compiler with a good manual. Highly
recommended.
FWIW, I've also heard good things about Hisoft Basic Compiler but ahve
never used it. It's supposed to be more QuickBASIC compatible, but I
understand it's less AmigaBASIC compatible.
There's also GFA Basic, TrueBasic, Blitz Basic, etc. but they give up
AmigaBASIC compatibility to get their whizbangs.