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:

21.06.2011 – 1.3a:

• Fixed weird exception when using Umlauts at the line end.
• Added tab configuration.
• Added undo/redo to toolbar/menu.
• Autocreate project if new document is created without project.

19.06.2011 – 1.3:

• Added image export for sprites.
• Fixed wrong modified state in sprite editor (selecting single/multi-color chars would set the project as modified)
• Added import/export of all sprites as image.
• Added import/export of all characters as image.
• Added pseudo pc macro.
• Added project configurations with predefines.
• Added element dependencies.
• Enabled sprite/charset files as part of projects.
• Added !ifndef macro.

Download: C64Studio v1.3a Beta (781)

source: lemon64.com