No, there is not a public official repository for Hydrax or SkyX. The reason is that I personally don't use a public repository for these projects inside Paradise Sandbox's dev environment, so I create a package for each public release.I have seen your plugins, skyx and hydrax, and I wonder if there is an "offical" GIT or mercurial repository. I've found the unofficial GIT repository for Hydrax.0.5.4 (what do you think about it?), but nothing for skyx.0.4. Do you release it only on a "download-the-archive" base?
About SkyX: I recommend using the official 0.4.1 package (http://www.paradise-studios.net/?page_id=270)
Hydrax: I recommend waiting until Hydrax 2.0 will be available, within 4-8 weeks. The current public version is too much outdated.
When purchasing an Hydrax 2.0 license (there will be different licenses depending of the target app), the client will have full access to the source code, but he will be not allowed to redistribute it. So, in open-source aplications Hydrax will have to be included as a precompiled dependency (.lib / .dll) and only including the header files, never the .cpp files.Moreover, I think you are right with the price you plan to ask for hydrax2.0, but how would it be released? opensource or not? If we plan to use it in our project, how should we pay it? Could we distribute it with the sources of the game?