Ranked in these QuestionsQuestion Ranking
Pro Cross platform
Works on Windows, OS-X and Linux.
Pro Easy to find installed compilers
The search for the installed compilers is quick, and it usually yields useful results on the very first atempt.
Pro Open source and free
CodeLite is licensed under GPL with source code available on GitHub.
Pro Modest memory footprint
CodeLite takes up about 50MB when loaded into memory with a workspace opened.
Pro A lot of useful plugins
CppCheck, DiffTool, Git, MemCheck (Valgrind support, Linux-only), SVN, and many other plugins extend the IDE functionality greatly!
Pro File Explorer-like workspace view
The workspace view, unlike other IDEs, is a reflection of the actual directory structure on the file system (with user filters applied).
Con Bland UI
The UI is fairly boring and has limited customization options.
There is a dark theme available, however it only applies to the editor. The surrounding windows and borders remain light.
You can see a collection of screenshots here.