DocFetcher is described as '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 macOS, and is made available under the Eclipse Public License' and is a very popular File Search utility in the file management category. There are more than 100 alternatives to DocFetcher for a variety of platforms, including Windows, Mac, Linux, BSD and Flathub apps. The best DocFetcher alternative is Recoll, which is both free and Open Source. Other great apps like DocFetcher are FSearch, Listary, Agent Ransack and UltraSearch.
Great alternative to DocFetcher, should be at top of the list. App updated July 2023. Configurable. Adjust font size. Select directory or folder, which it indexes. Add file types. Shows results list on left, preview on right. Click on a result for the doc, pdf, whatever, to open in your default reader.