Untapped.gg - MTG Arena Deck Tracker and Analytics
Importing and Copying Decks into MTG Arena • Beginners • MTG Arena Zone
MTG Studio - MTG Studio 3.81 Deck Builder and Collection Editor was just released with added support for #MTGGK1 (Guilds of Ravnica: Guild Kits). Press "Use App" to download it. | Facebook
Magic 2015/Deck Builder's Toolkit - MTG Wiki
GitHub - deckitron/deckitron: A collaborative Magic: The Gathering deck builder.
Draftpod: MTG Draft and Sealed Simulator
Download Deck Builder for MTG for PC Windows 10,8,7 - AppsForWindowsPC