Ah, fantasy sports: the Dungeons and Dragons of the jock world. There are more than a few options for you to spend your fantasy money on, but ESPN's seems to be the first that's ready for the 2013 baseball season. So if you've just got to get your lineup ready for the big office matchup weeks in advance of opening day, feel free to download ESPN Fantasy Baseball.
The app has all the new players, trades, and updated stats that fantasy sports depend on. Picks and match-ups will be synced with ESPN's servers, and you can access all of it through the main web interface.