University of Waterloo (Canada)
University of Waterloo: Bond Lengths and Bond Energy
Nice page includes a great deal of background on both bond length and bond dissociation energy. Includes a small table of bond energies as well as sample problems, graphics, and skill questions.
Other
Matter Project: Calculating the Enthalpy of Reaction From Bond Energies
This site gives you the bond energy of a variety of bonds and has you figure out the reaction energy. Nice application of bond energy theory.
Other
Matter Project: What Is Bond Energy?
Provides a Java applet that shows the change in energy of a bonded and a non-bonded atom.