docfetcher
DocSearcher
https://www.docsearcher.de/download.html
FileLocator Lite
https://www.mythicsoft.com/filelocatorlite/download/
FileLocator Pro
https://www.mythicsoft.com/filelocatorpro/download/
鹰眼快搜
textseek
https://www.textseek.net/cn/
文件管理助手