Thanks to the guys at Chromatic Labs, we've got three copies of Tabular for Mac to give away, worth US$19.99 each.

Tubular is a comprehensive application for reading, editing and writing tablature music on a Mac. If you're a musician, music teacher or composer of music who's looking to use tablature, Tabular has all the tools you'll need.

To find out more about Tabular, check out the review I did of it a little while ago here.

Here are the rules and how to enter:

• Open to legal US residents of the 50 United States, the District of Columbia and Canada (excluding Quebec) who are 18 and older.
• To enter, fill out the form below completely and click or tap the Submit button.
• The entry must be made before 3, May 2013 11:59PM Eastern Standard Time.
• You may enter only once.
• Three winners will be selected and will each receive a code to download Tabular for Mac with a value of $19.99.
• Click Here for complete Official Rules.