The LM78M05 is a three terminal (T0-220) 5V Voltage regulator that is capable of sourcing 500mA.
A 3.3V voltage regulator! AMAZING!
Look, it's another voltage regulator! Look at it go! Vroom, vroom! (They go vroom, right?)
The Dimension Engineering AnyVolt 3 Universal DC-DC Converter is an adjustable step up/step down 3A switching regulator.
The DE-SWADJ is the adjustable version of the "SW0XX" step-down voltage regulators. Using the same form-factor as a standard 78LMXX style regulator, it is a much better way to give regulated voltage to your project.
The DE-SWADJ 3 is a larger version of the DE-SWADJ adjustable step down voltage regulator, and is designed to be stronger, faster and better.