eesel - The new tab for work
dtsearch - dtSearch - The Smart Choice for Text Retrieval since 1991.
Findo - Your smart search 🔍 assistant across personal cloud ☁️
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Meta Search - Search your Desktop, Google Drive, Dropbox, Gmail, Evernote.
SearchMyFiles - Alternative to the standard Search For Files And Folders module of Windows. Duplicates search is also supported.