KeyPOS has quite a bit of charm, and I wish it were more extensible (eg: free software) like Core POS. The Electron app part is new, I know they were using Fir

KeyPOS has quite a bit of charm, and I wish it were more extensible (eg: free software) like Core POS. The Electron app part is new, I know they were using Firefox with a few XUL extensions in 2015. There probably wasn't much choice beyond Electron once XUL was killed, and their PHP codebase is one of the nicest I have ever worked on.