RIM said that it will have $2 million in rewards available for developers participating in its “Last Chance Port-A-Thon”, which is scheduled for this weekend.

The company is looking to bolster its app catalogue ahead of the launch of smartphones powered by its new BlackBerry 10 platform – scheduled for the end of this month.

Earlier this week, RIM said it had gained more than 15,000 apps from a similar event last weekend.

In a blog post, RIM said that developers can build or port apps using any of the development languages supported by BB10.

This includes ports from Android, HTML5 apps, Native C/C++ development, and apps built using AIR, jQuery, Marmalade, Qt, PhoneGap, Appcelerator, Sencha “and more”.