Recently, I've been wanting to make a custom live iso with a couple of tools that I need but I really don't know where to start or what to do… any help?
E: I didn't phrase my post correctly, I need a portable set of desktop tools for development, running on the gnome desktop
Just use Puppy Linux. Puppy creates a r/w overlay file which can be updated with any changes you make, so you can install any programs you like and have a persistent session. It’s also optimised for flash drive usage too - if your system has enough RAM, it can load the entire image into the RAM, making it very fast.