D-Terminal
The D-Terminal is an index of Digimon up through season two, including armored Digimon not seen in the anime. It also includes a translator that puts English letters into the Digimon alphabet, a couple of non-Digimon-related games, and a VS. battle mode. The index is pretty useful, allowing you to look up Digimon by battle card number, Digimon number, or name.