Decklists.net actually hosts two of our web applications created for the Topdecker.gr family.
The first one of course is a Magic: The Gathering decklist database application. Decklists are submitted in text form, and the application creates the appropriate decklist entities.
The second application is a Magic: The Gathering multiplayer draft simulator. Up to 8 players may join the same draft table and play, or if they are less than 8, play with bots, which learn from actual player's drafts.