I need to use FreeRTOS on stm32f103 with USB driver and FLASH storage. Is there some project freely available?

Thank you
Antonis

Take a look at some of the projects made available by Stefano, all of which target ST devices. I'm not sure if there will be an exact match for what you want, but it will be a good start.

You can find links here: http://interactive.freertos.org/forums/135228-stmicroelectronics (some are posted by Richard to projects hosted by Stefano, and some posted by Stefano directly).

Regards.

This link might be easier: http://www.stf12.org/developers/ODeV.html

Regards.