GSL: Guidelines Support Library
UnitTest++
Code Browser by Woboq
Shimo - Maven for C++
POCO C++ Libraries
Pandoc: a universal document converter
Issues Cloning Spec repo - GitHub taking a very long time to download changes to the Specs Repo
Counting Objects
Boris Kolpackov: New Build System for New C++
Code Synthesis
libsigc++ 3.0: Very variadic
Buildroot
A Differential Approach to Undefined Behavior Detection
DoxyPress
Seriously, C++, WTF?