I had a monk character that started a flurry of blows, hit an adjacent opponent with my first 2 attacks, killing him, then drew a shuriken and threw it at another opponent at range for my third attack.
On the other hand, literally, manipulating an object is generally a move action, so unless you're a psionic class with Hustle, getting a move action in the middle of a full attack isn't easy.
Switching which hand is holding a weapon isn't Quickdrawing a weapon. Even more so after swinging said weapon in an attempt to strike someone with it.
Quickdraw lets you draw and throw a number of weapons equal to the number of attacks your BAB indicates. TWF and the rest of that chain lets you do the same with your offhand, but only because you also have Quickdraw. No Quickdraw, you're stuck throwing darts and shuriken.
You can start a turn with handaxe A and handaxe B, and take 2 melee hits on target C with handaxe A, throw handaxe A at target D, take 2 melee attacks on target E, and throw handaxe B at target D, provided you (1)have enough attacks allocated to you, (2)take all of the penalties associated with each situation that granted those attacks, (4)make all allocated attacks with the corresponding weapons, and (5)make all of your attacks in order, from highest bonus to lowest bonus.
From the Latest FAQ:
Can a character with Quick Draw and a base attack
bonus of +6 or better make a melee attack with one weapon
and a ranged attack with another weapon in the same
round? What if the melee weapon requires two hands to
wield?
Yes. There’s nothing inherent in the full attack action that
requires all the attacks to be made as the same kind of attack or
with the same kind of weapon.
A character with a base attack bonus of +6 or better holding
a longsword, for example, could make a melee attack with the
longsword (using his full base attack bonus), drop the
longsword (a free action), use Quick Draw to draw a dagger
(another free action), then throw the dagger (using his base
attack bonus –5). If the character had both hands free (for
instance, if he didn’t carry a light or heavy shield in his off
hand), he could even use Quick Draw to draw a bow (free
action), draw and nock an arrow (free action) and then shoot
the bow (using his base attack bonus –5).
This situation is actually improved if the melee weapon is a
two-handed weapon. A character can hold a two-handed
weapon in one hand; he just can’t attack with it while it’s held
like that. Thus, he wouldn’t even have to drop the weapon in
order to draw and throw the dagger. If Krusk the 6th-level
barbarian had Quick Draw, he could swing his greataxe (using
his full base attack bonus), then leave the axe in his off-hand
while drawing a javelin with his primary hand (free action), and
finally throw the javelin (using his base attack bonus –5). If
Krusk were drawing a ranged weapon that required two hands
to use (such as a bow), he’d have to drop his greataxe.
Note the part about having to drop the longsword for drawing a dagger to throw (as to not incur TWF penalties). When you're doing something that voluntarily affects your attack bonus, you need to declare it before you make an attack, otherwise, you're playing rock, paper, scissors, and switching when you see what the other guy's doing.
