CBM Prg Studio
CBM Prg Studio 3.5.0 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The most popular versions of the software 3.5, 3.2 and 3.0.
The software lies within Development Tools, more precisely Debugging Tools. The default filename for the program's installer is CBMPrgStudio.exe. This free program is an intellectual property of Arthur Jordison. We recommend checking the downloaded files with any free antivirus.
From the developer:
CBM prg Studio is a Windows IDE which allows you to type a BASIC or machine code program and convert it to a '.prg' file, which you can then run in an emulator or on real hardware. It also includes character, sprite and screen editors and a fully featured 6510/65816 debugger.
You may want to check out more software, such as Stylus Studio, Nature Illusion Studio or Thumb Studio, which might be similar to CBM Prg Studio.