ARM tool:                       Streamline analyzer / DS-5

http://ds.arm.com/ds-5/optimize/

Ne10:            Open Source Library based on Neon

http://projectne10.github.io/Ne10/

https://github.com/projectNe10/Ne10

http://community.arm.com/groups/android-community/blog/2013/10/28/ne10-a-new-open-source-library-to-accelerate-your-applications-with-neon

Liano

http://www.linaro.org/

FreeRtos

www.freertos.org/portcortexgcc.html

http://www.freertos.org/portcortexgcc.html

Yeppp:

http://www.yeppp.info/downloads.html

CoOS:

http://www.coocox.org/CoOS.htm

Mirror:

http://www.myir-tech.com/download.asp