CppDepend - Master Your C and C++ Codebase with Precision and Insight
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
Understand - Combines a powerful Code Editor together with an impressive array of static analysis tools that will change the way you work with code.
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
SonarQube - SonarQube, a core component of the Sonar solution, is an open source, self-managed tool that systematically helps developers and organizations deliver Clean Code.
X1 Search - X1's Lightning-Fast Search Software. Premium Alternative to Windows Desktop and Outlook Search.