Request: Password Manager

I should have done this a long time ago, yet I have not.

I am of course talking about that I have to stop using the same passwords for every site I register to. So I really think I need a way to create new passwords and storing them in a keychain (or something...). I would also need to access them on OS X.

But there seem to be so many choices out there, so I was just hoping that you guys could shed some light on this matter.

I look forward to your suggestions. :-)