DiskCatalogMaker - Simple, smart and fast disc management tool.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
abeMeda - abeMeda is a powerful and very fast disk cataloging tool, reading metadata like EXIF, IPTC, JPG, TIFF, MP3, AAC (iTunes)
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Virtual Volumes View - VVV uses a relational database to store its data.
X1 Search - X1's Lightning-Fast Search Software. Premium Alternative to Windows Desktop and Outlook Search.