Relaunch64 is an IDE (text-editor) for C64 assembler-coding on Windows, Linux and Mac OS X. Relaunch64 has a clean and intuitive user interface, yet it offers many features that make coding faster and easier.
Java 7 or higher is required to run Relaunch64. The program is licensed under the GNU GPL 3 (or higher) and free for private and professional use.
This editor works together with common cross assemblers. Currently supported assemblers are 64tass, ACME, ca65, DASM, DreamAss, Kick Assembler and TMPx. Other assemblers might work as well, but syntax highlighting may not be 100% correct.
German and English C64-wiki pages.
Download devel-snapshot from Sourceforge.