It’s in the works a new assembler called ORGAMS for the Amstrad CPC.
ORGAMS is a ROM based assembler (use it with the great X-MEM by TotO) and is loosely based on DAMS/Turbo Assembler. You can discuss the features or ask for help in the dedicated thread in the Push’n’Pop forum. Parlez-vous français? If so, you can also check out the Orgams Wiki. The latest version of the assembler can be downloaded following the link below.
Link: Push’n’Pop forum
Link: Orgams Wiki (French)
Download: Push’n’Pop