Last month developers across the world spent three short weeks crafting over 130 applications as part of the Ubuntu App Showdown contest. From these, three winners were picked by a jury of judges: RSS reader 'Lightread', puzzle game 'Picsaw' and web-app creator 'Fogger'. But that's not where the contest ends. It's now up to you to decide which apps win the last 3 prizes up for grabs. To help you get started we've listed our top 20 submissions - jury winners omitted - that are worth installing regardless of whether you intend to vote or not