FileZilla - FileZilla is an FTP, or file transfer protocol, client. It lets individuals transfer single files or batches to a web server. For many years, FTP was the standard for website design. Read more about FileZilla.
DocFetcher - DocFetcher is a portable German/English open source desktop search application.
Cyberduck - A libre FTP, SFTP, WebDAV, S3, Backblaze B2, Azure & OpenStack Swift browser.
Everything by Voidtools - Everything. Locate files and folders by name instantly. Everything. Small installation file. Clean and simple user interface.
WinSCP - WinSCP is an open source free SFTP client and FTP client for Windows.
Agent Ransack - Agent Ransack is a tool for finding files and information on your hard drive fast and efficiently.