libccrt intends to be a complete replacement for the libstdc++.
It comes with it's own memory management and brings great ideas from different programming languages to the C++ programming language. Examples are PHPs copy on write behaviour and the structure of the Java API.
Features:
- memory efficiency in space and operations
- threadsafe implemtation
- transactional/atomic object operations
- Java-ish interface
During it's early development some features may be implemented on top of the standard C++ library but as the library evolves it aims to eliminate all external dependencies.
Oh - and by the way: Until it reaches a minimum level of maturity, this is a private one-man-show.