Pretty sure some letheans and remans have psionic based attacks,

Some remans in the Temple team mission have a purple AOE attack, as well as the Reman Sci Boff
If memory serves the Reman Borg in Khitomer Accord uses a purple variant of 'rapture' (see below)

Letheans can have a trait called 'rapture' shoots a red mental beam at the enemy

And Vulcans -MIGHT- be considered psionic with mindmelds.. dont think it causes damage though