Seems like the hard part is come up with ideas to a standard library so I mindstormed a little and this list ocurred to me. I hope someone will add up to this list or even volunter to take care of a certain topic.
- System interface: we can send commands to the system through the system() function but what about a library that wraps some common calls in a consistent and OS abstracted way. For example: clear() -> it would clear the shell both in Linux and Windows. (I know we have the clear screen command already

)
- Math
- Eye candy: some graphics functions (?) like GUI's (this should prove a lot of work but its still an idea

)
- Strings: some more advanced functions for string manipulation.
That's the end of my imagination

for now. I'll add more as they pop in my mind. Add up your ideas too.
Best Regards,
psnake