What is the development enviroment of open source software CRU?

[ToastyX]

Borland Turbo C++ Builder 2006. Honestly, the code is a bit of a mess because it was designed before I had knowledge of all the different data structures, and I'm also stuck with some limitations from using an old version of C++ Builder. I've been wanting to rewrite it from scratch to take better advantage of C++ features like templates and polymorphism and to design the code better so it can be used as a library with any C++ compiler, but there's so much to do that I'm not sure if it's worth the trouble. I might have to eventually because I want to eliminate the reliance on C++ Builder, and with the knowledge I have now, I can do a much better job structuring the code.