Is there any way to see / reveal Akali in her Twilight Shroud?

Twilight Shroud is just like any other form of stealth. This means, among other things:

• Area of Effect abilities and attacks will still affect her. Akali's stealth is very limited in location -- if she's stealthed, you have a pretty good idea of where she is.
• Any stealth revealing item, like Vision Ward or Oracle's Alteration means you won't lose track of the ninja (though she will retain her armor / MR bonus as long as she's in the cloud. Sweeping Lens will also warn of her location, but not reveal her.
• Use champion abilities (where applicable) to reveal her. Lee Sin's Q or E, Nidalee's Traps, and Kog'maw's Living Artillery all reveal stealthed units -- and, again, you know where Akali is (relatively). If you are (or have one of these champions on your team) make sure that they're using their anti-stealth abilities to reveal her.

Oracle and Vision wards. But there are some spells that might not see her but could attack her or draw her out of stealth.

• Shen's Taunt can draw Akali out of her shroud.
• Any one with skill shots, e.g. Ezreal, Caitlyn, Anivia, Dr. Mundo... These attacks could either kill Akali or make her need to leave her shroud cause she might die inside.

• Katarina's ult can focus invisible champs so ulting near the shroud would kit Akali.

• It's mentioned above that Corki's Phosphorus Bombs (his Q) can reveal Akali, but that was changed in a previous patch, it no longer reveals stealth.