Quick C/C++ IDE with Emacs and clang/LLVM
Using my Emacs configuration. C/C++ are the focus of this clip, but you'll be set up for much more. Most of the clip is sort of boring (waiting for stuff to download from MELPA and etc) but everything comes together at around 0:57 seconds in.
The auto-expansion bits (like when I expand main into an actual function) are provided by YASnippet, the autocomplete by