For wildcat look in the main thread here DSO203 GCC APP - Community Edition (2.51+SmTech1.8+Fixes). Wildcat is an offshoot of the original community edition but now has a lot of improvements and functionality of its own. The most posts in that thread have zips for v3.4 and v4.0. The latter has even more functionality but takes up more memory space.
For Gabonator look in the main thread Alternative dso firmware [Application Software Design Entry] and there is a github repository github.com/gabonator/DS203 for the code.