There are a number of file search boxes available for download that can be used to search for and download free PDF, DOC, and PPT files. One popular option is **FileSearchBox**. FileSearchBox is a free and open-source file search engine that allows you to search for and download files from a variety of sources, including websites, file-sharing sites, and cloud storage services.

Visit the following website:

https://filesearchbox.com/

FileSearchBox is excellent options for finding and downloading free PDF, DOC, and PPT files.