The weekly Humble Bundle is live and contains Linux, Mac, and PC versions of Dust: An Elysian Tail and six other games.
Year Walk, Lovely Planet and The Blue Flamingo can be yours for the current average, but if you pay more than $4.66, you will unlock Dust: An Elysian Tail, MIND: Path to Thalamus and Eidolon.
Pay $10 or more to unlock the musical exploration game FRACT OSC.
All come with Steam keys, but some titles are not available for Linux.
Hit up the link to purchase or for more information.