A powerful and fast search tool using regular expressions
grepWin is a simple search and replace tool which can use regular expressions to do its job. This allows to do much more powerful searches and replaces.
Desktop search application
DocFetcher is an Open Source desktop search application: It allows you to search the contents of files on your computer. — You can think of it as Google for your local files. The application runs on Windows, Linux and Mac OS X.
deletes junk files to free disk space and improve privacy
BleachBit frees disk space and maintains privacy. Cleans cache, Internet history, temporary files, logs, cookies, Firefox, Google Chrome, Flash, Windows, Linux, and more. Downloads are at www.bleachbit.org and source code is at GitHub.
Track and Search your recent documents and folders, customizable
Recent Document Tracker Implements a similar function to Windows 7 Jumplists by tracking recent documents and folders, then by using document type icons in the taskbar tray you can pop-up a menu of recent documents sorted by last access time (like Jumplists) allowing you to quickly search for the files/folders you need. You can also pin/exclude documents as well indicate which documents are open is MS Office applications.
Access your files, programs, browser bookmarks, search engines and win
Yal can help you speed up the way you interact with your Windows based PC. You can easily access your favorite programs, documents, even browser bookmarks. You don't even have to type their full name. Yal can usually tell what you actually want, without expecting many input characters. There's also TAB completion that could come handy in some cases. The more you use Yal, the better it gets. It keeps count of the keywords you enter and the entries you execute, thus it will always give you the best possible suggestions. You can also perform simple math calculations, access your clipboard's history, termitate processes, you can quickly switch between opened windows, perform searches using your favourite search engines...and more to come.