Amiga University
Miscellaneous sources and examples, including all issues of "The Source" coders magazine.
Asm-Pro for Amiga MC680x0
Information about assembler coding and demo-coding for Amiga range of computers, also useful for C(++). And home of Asm-Pro m68k macro assembler.
Chaozers' Assember Page
Contains tools, documentation and sources (includes, for example, a DBM player and the latest AsmONE and AsmPro).
Superior's Amiga Assembler
Sources for various graphic demos, intended as learning material for beginners.