Found another two VTE based terminals that look interesting:
-- lwt [1]. This is pretty much the most minimal terminal you can
build with VTE.
-- taterm [2]. It's very similar to my own terminal emulator,
xiate, because there's just one running instance of the program.
It appears to be using dbus behind the scenes. It's more minimal
than xiate, though, because it doesn't accept any command line
arguments. This means you can't do a "taterm -e foo".
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1.
https://github.com/mewkiz/lwt
2.
https://github.com/t-8ch/taterm