Rainbow IDE Description:

Experience the power of streamlined assembly development for your favorite computer with Rainbow IDE for Windows XP, 98, ME, 2000, 95.Rainbow can build virtual floppy disks and ROMs and you can see your software run immediately if you have the M.E.S.S. (www.mess.org) system. No other IDE lets you go from source code to running in a streamlined fashion like Rainbow does. It's a very smooth experience!Rainbow includes various popular cross assemblers and lets you add your own! You can even use a different assembler for each source code file in your projects if you like.You owe it to yourself to give Rainbow a try right now and see for yourself how smooth and easy it can be to create assembly software. Finish those projects!
Summary of Features
Very user-friendly, easy to learn
Drop-in cross-assembler support with these included: CCASM, CASM, TASM, OS-9 Level II 6809/6309 RMA/RLink, OS-9 ASM 6809/6309 Assembler, TASM multi-CPU cross assembler (6502, 6800, 8048, Z80, and many more).
Build software for the CoCo, Dragon, Vectrex, Atari, Commodore, Apple, and hundreds more systems

Build virtual floppy disks and ROM images
Create or load assembly source code, BASIC programs, text files, binary files and more
Multiple document interface (MDI) with multi-row tab option
Full search and replace, cut/copy/paste, undo/redo capabilities for text *and* hex editors!
Split-window option while editing
Nice HEX editor for binary files
Optional line numbers, tab widths, and more editor settings.
Insert code snippets and assets into your project (keyboard scanner, video modes, CoCo system definitions, and more)
One-step build process, with large Build button
Built software can be run on an emulator that your software is designed for
Set various M.E.S.S. configurations from within the IDE, like video effects, custom options, full-screen/window, throttle, and more
Checkbox-enabled assembler options for generating assembler listings, symbol dumps, quiet mode, debug mode, and error reporting
User-selectable fonts for the assembler, text, binary, and readout windows