smallhagrid, Thanks for the links re. Gnome-Boxes. I should have said that I saw the first 2 articles the other day but only skimmed them looking for a critique with potential red flags and missing features as compared with VirtualBox and VMWare. I appreciate your remark about pre-existing VMs. For me that's a deal-breaker. In general I prefer open-source apps when they fit my needs, but I guess for now I'll stick with VB after all, since I have a few versions of Windows VMs set up as I like, and backups & transfers to another PC are easy. Probably better not to change what's working for the few times I use Win. My interest in Gnome-Boxes was primarily if it was lighter weight than VB, but now I think rather than starting over with another app I'll just move VB to another desktop with higher specs to improve response time. Life is too short to rebuild my working VMs on another app just for the few times I use them. If VB should ever fail me in a future update I'll probably just multi-boot some Linux distro + WinXP +Win7 in a spare PC for a few favorite old games and utilities I'm not ready to give up yet. Other than those, I'm Linux all the way. Thanks again for the Gnome-Boxes info links, and for all the great apps you & others have pointed out in this thread! I'll add some of my own favorites when I get my house back to normal.
Not software but 64 bit games: SuperTuxKart - Mario Kart and Rocket League clone. Xonotic - Unreal Tournament alternative. OpenRA - "Open Source reimplementation of Westwood Studios' 2D Command and Conquer games". In case you are bored and don't want to enable 32bit just to install Steam and play games.
Every so often I need to do some sort of very basic image manipulation, and had not needed to in a while so it was forgotten about. Until yesterday - when I wanted to erase an unwanted bit from an image...and realized what my go-to app for that has always been. Good old paint. Wow. Hadn't given it a thought since changing OSes - but that single app may well be the very BEST thing that m$ ever put out...like really - ever !! After checking what is around the 1st I looked at was Pinta - and can only say=> STAY AWAY FROM PINTA !!! (It is a crashy mess that fails reliably under Ubuntu 18.04.) But then I found KolourPaint and it is just what I needed - did what I wanted in a few minutes & now when I need to mess with an image it is ready to use anytime. Just a small addition here about “Warpinator”: It will be very welcome when it becomes finalized (and renamed ??), but for right now it is only available as source code on Github that needs to be built per user. This is according to the latest news I could find about it. Openly & easily sharing files on the LAN does desperately need this sort of help & hopefully it will arrive in a more finalized form soon !!