Eclipse is already portable, and it handles a large variety of programming languages. Sure, you still need Java installed on the host system, but in most cases, it works fine.
New: KiCad (Mar 25, 2025), Platform 30.0.2 (Mar 27, 2025)
1,100+ portable packages, 1.1 billion downloads
Ad Free! Please donate today
I have JRE on my USB key and Eclipse and it works fine...
Probably you still need some java on your host computer, but usually it is installed anyway....