Different type of bends include:

Sheet Bend
Used for joining two ropes of similar diameter. Commonly used in the 'bending' of flags.

Double Sheet Bend
A stronger version of the sheet bend

Carrick Bend
Used for bending hawsers together.

Reeving Line Bend
Useful if two lines are to be fed through a small pipe.

Cat's Paw
Used to secure to a hook for hoisting.

Studding Sail Halyard Bend

Studding Sail Tack Bend
Will not come undone by the flapping of the sail.