Extra Melee Weapon Attack with Swift or Immediate Actions

[Hrothgar Rannúlfr]

Are there any abilities which grant an extra melee weapon attack through the use of a swift or immediate action?

[Alex Mack]

Hurtful Feat

Parry and Riposte Deed

Ranger Tricks: Vengeance Strike

are the ones I can think of off the top of my head. Also flagged to move to Advice Forum.

[SheepishEidolon]

There are at least the following feats:

Swift action:

Snapping Flank
Panther Style
Tatzlwyrm Rake

Immediate action:

Snake Fang
Target of Opportunity
Giantslaying Team
Returning Throw

But from my feeling there should be significantly more class abilities than feats about it...

EDIT: Striked through two because they are for ranged attacks, but didn't remove them because maybe someone else cares for them...

[Hrothgar Rannúlfr]

Thank you, Alex Mack and SheepishEidolon.

[Chess Pwn]

ki pool.
quickened spellstrike.

[thorin001]

Any of the ways to get Haste.
Someone casting the spell on you.
Speed weapon.
Boots of speed.

[Alex Mack]

Ninja and Teisatu vigilante Ki-Pools grant uncoditional bonus attacks on a full attack.

Also the Up close and Personal Talent for the Vigilante.

[Saraphali]

These Teamwork feats

coordinated charge
Feint partner
Improved feint partner
Broken Wing gambit

just have a friend or companion, and make sure you both (or all) of you get improved feint, one person charges, everyone else does. then you feint, and everyone attacks. when he tries to hit you, everyone attacks

(might want combat reflexes)

Have fun!