Initial Learning resources for STM32

Linux on Cortex M3 using ARM Embedded Linux Kernel
uCLinux on Cortex M3/M4
FreeRTOS Cortex M7 demonstration
Porting Linux to ARM

Wikibook: Operating Systems
Wikibook: Embedded Systems
Complete guide to Cortex M3
Complete Linux Porting Guide(Condense and publish in Blog)
uCLinux Porting Guide
Microcontrollers(Condense and publish in Blog)
Online courses on microcontrollers!