https://docs.freeplane.org/ Download link https://sourceforge.net/projects/freeplane/files/freeplane%20stable/Freeplane-Setup-with-Java-1.11.10.exe/download
https://www.acdsee.com/en/products/acdsee-free/ End User License agreement doesn't prohibit business use.Ease file browser with log of graphic formats supported
Webtools add-in for SuperOffice. This add-in needs admin permission to install. Think it is updated 3-4 time a year https://www3.superoffice.com/DownloadService/