Leaving out Clairvoyance, wards and other items which reveal enemies like the new Wriggles in twisted treeline,
which champion skills grant vision through the fog of war? (e.g. in bushes?)
I'm not talking about stealth opponents.
For example:
Mundo's Cleaver (Q) does not reveal champions it hits.
Malzahar's Silence (Q) though reveals any champion it hits briefly.
Best Answer
Taken from: http://leagueoflegends.wikia.com/wiki/Brush.
Skills that give visual of the brush:
Reveal enemies that touch or aggro them within the brush
Skill that give vision of the brush differently:
There are champions who can summon pets. These pets can either spawn in a brush or need to be sent there first. They also give vision if they walk into a bush:
If a player fires a skill shot into the brush, it won't make them visible even if you hit them. However many of them have a secondary effect or a different sound effect on impact: