You know the Calling All Innovators contest offers cash prizes of up to $30,000 (USD) for top apps in each of the four application categories: Eco/Being Green, Entertainment, Life Improvement, and Productivity. And you may know the original May 18 entry deadline has been extended to June 10 — giving you more time to create something great!

But did you know that all submissions to the contest — whether they are finalists or not — will be eligible to win special prizes? There is a $50,000 (USD) prize for the best app for the Nokia N900. Another $50,000 (USD) for the best cross-platform app built using Qt. Another $50,000 in total prize money for utilities written in Qt.

Here is the full list:

• Best mobile computing application: $50,000 (USD) in cash, plus the winner of this special prize will be included in a multi-million dollar global marketing campaign that will be used to help promote the winning app.
• Best application for the Nokia N900: $50,000 (USD) in cash.
• Best cross-platform application using Qt: $50,000 (USD) in cash.
• Best locally relevant application with global potential: $15,000 (USD) in cash.
• Best new utility: $30,000 (USD) in cash