C64 Studio is a .NET based IDE written by Georg Rottensteiner. This app supports project based C64 assembly.

The internal assembler is using the ACME syntax. In connection with Vice the IDE allows you to debug through your code and watch variables/memory locations, registers and memory.

Any other emulator can be set up as well if it’s startable via runtime arguments. C64 Studio allows you to compile to raw binary, .prg, .t64 or cartridge format (.bin and .crt for 8k and 16k). Additionally to this C64 Studio comes with a charset and sprite editor.

Version history:

31.07.2011 – 1.5:

• Fixed bug in parsing !byte with binary values.
• Fixed bug in file info storage, sometimes error messages were accredited to the wrong file.
• Fixed bug where warnings were not displayed (segment overwrite).
• Added charset/sprite functions as buttons.
• Changed charset copy/paste to always use clipboard

Download: C64 Studio v1.5 (792)

source: lemon64.com

Goat of Laxity has released a Trained version of the game: On the Farm 2 for Commodore 64.

Download: On the Farm 2 +3 (1164)

source: noname.c64.org

Unofficial version of the Sidplay64 by GRG/Shape.

This version supports directory browsing and image (d64,d81) for the devices SD2IEC/Netdrive/IDE64. This version is still in a beta stage.

Download: Sidplay64 v0.695 Beta (1352)

source: noname.c64.org