LibRETS
From RETS Community Wiki
[edit] What is libRETS?
libRETS is an open-source, C++ RETS library with SWIG-generated bindings for Ruby, Python, and Microsoft's .NET Framework. It provides support for logging in, logging out, searching, metadata retrieval, and object downloads.
More about libRETS (including source code) can be found at the CRT's project site.
