Dice Probability Chart Not directly video game related, but useful if you're wanting to make a game using two dice as a model for randomness.
Doctor Mario 64 Overview of the puzzle game, from SMBHQ, via the Wayback Machine
Donkey Kong An overview of the arcade game. Originaly published on SMBHQ.com. Archived in the Wayback Machine.
Donkey Kong 3 An overview of the arcade game. Originaly published on SMBHQ.com. Archived in the Wayback Machine.
Donkey Kong 94 An overview of the Gameboy game. Originaly published on SMBHQ.com. Archived in the Wayback Machine.
Donkey Kong Country/Land Series overview, from SMBHQ, via the Wayback Machine.
Donkey Kong Jr. An overview of the arcade game. Originaly published on SMBHQ.com. Archived in the Wayback Machine.
Dreamcast Proto Stuff Pics of various case designs for Seag's last system. From pelikonepeijoonit.net, via the Wayback Machine.