Your question is very vague. Are you asking about cool projects written in C++? Are you asking for C++ snippets of code that at a glance look weird, but after you inspect it, turn out to be very interesting and useful?
A cool C++ project you can take a look at is ZNC:
https://github.com/znc/znc
It is an IRC bouncer.
A bunch of cool things are written in C++. Allegedly modern console firmwares are written in C++, rather than C.
Here's a cheatsheet for strings in C++:
http://www.broculos.net/2007/11/c-stl-string-class-cheatsheet.html
Now, all that said: what do you mean?