New things to make or learn?

[Omni]

Im really a C++ fanboy and i probably know almost every aspect of it
and i was wondering if there are websites or ebooks (or anything else)
with some tasks to do, like making things in C++ that do handy stuff

like a class to monitor allocated memory, and when there are no references
left, it will free the memory
or a dynamic array class, linked lists and stuff like that

just C++ things for wich you really dont need anything for, except for plain C++

does anyone know where to find this? because i really like programming and
making things work faster and making things smaller

 

[Weegee]

Google C++ Challenges ? I dunno its free

 

[Sintoras]

Well, if you like math theres always Project Euler. But those really aren't very useful programs, they just solve one problem.