dnGREP - dnGrep allows you to search across files with easy-to-read results.
Vaultedge - Access all your documents in one place.
AstroGrep - AstroGrep is A Microsoft Windows GUI File Searching (grep) utility.
Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
PowerGREP - Quickly search through large numbers of files on your PC or network using powerful text patterns to find exactly the information you want. Search and replace with plain text or regular expressions to maintain web sites, source code, reports, ...
eesel - The new tab for work