How much current do you require? The dropout voltage is dependent on output current so the 7805 may be work in your application. I do not recall the change
for a 7805 but for some devices it can be quite large.
Another linear regulator to look at (in a TO-220 package) is the NCP1086 which has a dropout of 1.4V max (1.05V typical) at 1.5A. The NCP1086 can be purchased as fixed 3.3V or adjustable (to 5.5V).
If you can do SMD there are lot more options.
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