Young Avengers:

Hawkeye (Kate Bishop)
Noh Varr
Hellion
Surge
Icarus
Molly Hayes
Victor Mancha
Prodigy
Spider-Man (Peter Parker or Miles Morales)
Spider-Woman (Gwen Stacy)
Ms. Marvel (Kamala Kahn)
Butterball
Reptor

Young Justice:

Starfire
Raven
Beast Boy
Cyborg
Wonder Girl
Artemis
Blue Beetle (Jamie Rayes)
Aqualad (Kaldur/Garth)
Ms. Martian
Arsenal/Red Arrow
Jericho
Zatanna
Zachary Zatara

Just the list from the start of all the young heroes I could think of.  With those who have been claimed taken out.  I won't completely confirm them yet, so they might open back up later on.