Telepathy – The ability to read the thoughts of, or to mentally communicate with others.
Saturn Girl (DC) is one of the most powerful telepaths in the DC universe.
Saturn Girl apparently has the power to make others telepathic! This power has huge potential which in typical Silver Age manner is never used systematically since it’s a throwaway power i.e. a plot device power (Superman V1 #176).
Keepers of the Ages – Creature Collection III. Savage Bestiary
Link (Wildstorm) was a powerful telepath in Youngblood Battlezone #2
ManEater (Savage Dragon)
MindWarp (Savage Dragon)
Mother May is not just a telepath but also has mind control as a power in Cyberforce-Sourcebook #1.
The Sensorites (Doctor Who) are a telepathic alien race in First Doctor Sourcebook.
Vampires in the Marvel universe have created a Telepathy Virus in X-Men-Curse of the Mutants-Smoke & Blood #1
Trading Card Games have a few telepathy cards.
Star Trek-Vulcan Mindmeld
Cassandra Anderson – 2000 AD #1045
Fraal – TSR 2173 Monstrous Compendium Annual Volume 4
Janus Psi – 2000 AD #980
Legion of Super Heroes (DC) – Telepathic Ear Plug – MF232 Hardware Handbook
Tyranny Rex – Deus Ex Machine – 2000 AD #856