Bizagi Modeler - looks like a really sharp flowchart and diagramming program. I was frustrated by this one as I jumped through all the hoops to get this going and then get a registration screen that closes the program unless it's completed. Posting this to the "not portable" subforum as I think it's Electron-based.
Websites
https://www.bizagi.com/en/platform/modeler
https://www.softpedia.com/get/Office-to ... eler.shtml