Foundation / Framework Library

• POCO C++ Libraries – http://pocoproject.org/
• Dlib – http://dlib.net/
• LIBH – http://libh.slashusr.org/
• NCBI C++ Toolkit – http://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/
• rulib – http://www.wheresjames.com/rulib/

Design patterns / data structures

• Loki – http://sourceforge.net/projects/loki-lib/

String

• The Better String Library – http://bstring.sourceforge.net/
• ICU4C – http://site.icu-project.org/
• fmt – https://github.com/fmtlib/fmt