[C++] Online compilers

I find that online compilers are very handy. Here are the ones that I've tried so far...

  1. ideone, which is probably the most famous
  2. coliru, which allows to customize the command line
  3. webcompiler, which uses Visual C++
  4. wandbox, which virtualy supports every version of GCC, Clang and Boost.
  5. godbolt, which show the assembly code for x86, ARM, AVR and PowerPC