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There's lots of options out there - a good way to browse is via one of the major ("supermarket") component suppliers' websites such as RS, Farnell, Mouser, Digikey etc.
Take for example this parametric search from element14 (formerly Farnell) : **broken link removed**
[To introduce the terminology, an "LDO regulator" means a "low-drop-out regulator", or one that doesn't require much voltage differential between the input and output voltages. The 'traditional' 7805 required ~2.5V, which imposes power dissipation issues at high output currents, and prohibitis operation on low voltage (e.g. 6V battery) supplies.]