rsx++ is a Direct Connect client with various features, basically designed for operators. it's based on StrongDC++ (a DC++ mod) which means rsx++ inherits all features from it (sometimes extended in some way). the key features for operators are User Info detector (MyINFO detector in the past), rewritten Client detector (which is more flexible and works with ADC protocol - yeah, this from StrongDC++, that was me and Crise), IP detector and many more ;) it is possible to extend functionality by adding lua scripts and plugins (starting with 1.1 rsx++ drops compatibility with BCDC++ scripts in favor of own implementation of the lua api - more powerful and probably more resource friendly).