New: Qalculate! (Sep 29, 2022), Platform 22.0.1 (Jul 21, 2022)
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I don't know how many of these can be made portable but all I know is there are a ton of games that could be added to the library.
Might be worth taking a look
going to take a look at it, however I am not advanced and you probably won't hear somthing about me :^p
if it is a succes, I'll let you know