DocFetcher - DocFetcher is a portable German/English open source desktop search application.

TagSpaces - TagSpaces is an open source platform for personal data management. With TagSpaces you can manage and organize the files on your laptop, tablet or smart phone.

Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.

TagFlow - TagFlow is an intelligent files manager that use tags for organize your documents.

Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.

Tabbles - Tabbles use tags to organize and find files along with your colleagues.