Yeah, I know I don't play WoW anymore, but I figured I should at least post some of the macros I've used for my characters... Starting with my druid!

Here are the ones I use while in Caster form...

#showtooltip
/cast [modifier: alt] Revive; Rebirth

Simple modifier macro. It'll have you cast Rebirth as default, or you can hold Alt to use Revive.

#showtooltip Moonfire
/cast [help] Abolish Poison; [harm] Moonfire

Casts Abolish Poison when you have an ally targeted. Casts Moonfire when an enemy is targeted.

#showtooltip Starfire
/cast [help] Remove Curse; [harm] Starfire

Same thing as above, except with Remove Curse and Starfire.

Some shifting macros...

/cast [stance:1] !Dire Bear Form
/cast [stance:2] !Aquatic Form
/cast [stance:3] !Cat Form
/cast [stance:4] !Travel Form

This macro "swiftshifts" the druid back into the same feral form that he's already in. Useful in getting rid of any snares that are currently on you or for getting Rage (assuming that you have Furor).

/dismount
/cast [nocombat, noswimming, flyable, nostance:5] Swift Flight Form; 
/cancelform [stance:5]
/cast [swimming, nostance:2] Aquatic Form;
/cancelform [stance:2]
/cast [nostance:4, noswimming] Travel Form;
/cancelform

The "Best Traveling Form" macro. First, it'll check if you're on a mount (if you are, you will dismount). Then it'll try to cast Swift Flight Form if you're in Outlands or Northrend. (It'll try to cast this even if you're indoors. D: ) If you're swimming it'll cast Aquatic Form, and for everything else it'll use good ol' Travel Form. ...Oh! And the "/cancelform" line will shift you out of any form you're currently in.

Annnd... Kitty macros!

#showtooltip
/cast [modifier: ctrl] Savage Roar; [stealth] Ravage; [nostealth] Shred

When stealthed, it'll cast Ravage; if you're not stealthed, it'll cast Shred. When you hold Control, you can cast Savage Roar.

#showtooltip
/cast [modifier: ctrl] Feral Charge - Cat; [stealth] Pounce; [nostealth] Rake

Similar to above. When stealthed, it'll cast Pounce; if you're not stealthed, it'll cast Rake. When you hold Control, you can cast Feral Charge - Cat.