What's program language is used commonly?

[Macabre]

Personally i use blits or amos for games and C/C++/ASM for other programs.

My personal best C/C++ compiler is Storm C, atleast on my a4000 and 1200 with a 040@40Mhz eccelerator
I use lattice on my a600 and 500.

For ASM i use ASM-ONE since it can use my Cybervision 64/3d for the source editor and debugging.  

[Macabre]

Just tried AmiDevCPP, and ehh, just GREAT.

Fast compilation , and already creates some startup code (like creating a standard window).

It also has syntax highlighting and syntax popups when youre typing...

And since my Amiga4000 and 1200 are in my domain  (using Miami and Samba) i can set the output directly on my amiga for a fast test.

Should also work with Amiga Forever zince you can alter your windowz drives directly. Should be great for testing...