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Psychic Modulation's Metatron is just one of the plug-ins in contention.

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Now in its third year (though it didn't actually happen in 2008), KVR's Developer Challenge gives music software coders the chance to compete to create the finest new free plug-in or app.

Better still, it gives users the chance to download these and then vote for their favourite.

Submissions for the 2009 KVR Developer Challenge have now closed, and a total of 42 free treats are awaiting your attention. Discussing the motivation for the contest, KVR says: "The challenge is to create and release a brand new free audio plug-in or audio application that will benefit the community at large.

"Creativity is key, it can be as simple or as complex as you want - KVR members will vote on the entries and pick the eventual winner. Anyone can make a donation via PayPal, the prize fund will be distributed to the eventual winners (details below)."

As we write, that prize fund stands at £832. Make sure you put some money in the pot if the entries impress you.