This library implements a few boost objects, such as functors, lexical_cast, or types_lists. Although some tests might happen to be using the C++11 standard, libspeed is supposedly fully C++03 compatible.
Do not use this library in your project. libspeed is just a learning project I spend time on when I want to practice my meta-programming skills, it is definitely not stable and will break your code.
If you still intend to use it (for the same purposes I do), be aware that it was only compiled with the gcc compiler, and that certain features are OS-dependant (such as the Atomic methods).