MTG Studio is Magic: the Gathering® deck and collection editor.

With MTG Studio you can create magic decks to play with and organize your own paper card collection.
The product ships with the most complete MTG database in the world. The database includes over 21 000 cards from all editions ever released.

MTG Studio has the unique feature to open and edit many decks simultaneously.
There is support for almost any known Magic deck format such as MTG Online II, MTG Online III, Apprentice, Magic Workstation, Magic Suitcase, MTG Interactive Encyclopedia, MTG Play, OCTGN, Shandalar, Duels of the Planeswalkers, Mana Link, Mana Link 2.0.
The decks created with MTG Studio can be exported to various office formats such as HTML, Excell, XML, Txt.

The program has advanced multiple-criteria filtering and grouping.
MTG Studio can be translated in any foreign language at 100%.
MTG Studio offers Deck Legality check routines, Manalyzer, Probability Analysis, Starting Hand, Rulings, Oracle Texts an lots more.

MTG Studio has won many awards and currently has more than 137 000 users in 142 countries (11 992 cities) across the world.

For complete list of supported features read the Feature Matrix.
You may also read the comparison between MTG Studio and other Magic software.