MeshNetics - 802.15.4 / ZigBee Wireless RF Modules
MeshNetics is a creator of easy-to-integrate 802.15.4 / ZigBee wireless RF modules and ZigBee PRO-certified mesh networking software, used by OEMs and system integrators to add wireless connectivity to their products and solutions. MeshNetics RF modules feature industry-leading range performance, long battery life and ultra-small footprint. They are designed for use in 868/915 MHz and 2.4 GHz frequency bands. MeshNetics is a single source of ZigBee modules, development tools, networking software, technical support, and design services.

Telelogic Modeling Community: Whitepapers - UML, C/C++, OO Programming

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ROM Dos Demo (Free Version)
The ROM-DOS Single User Version is a Free DOS solution perfect for desktop users and OEMs wanting a single seat drop in replacement DOS. The ROM-DOS Single User Version includes both 6.22 and 7.1 kernels. Long File Names (LFN) are supported along with a full DOS utility suite and is available for electronic download. Documentation is provided in electronic form.
preview: http://datalight.com  

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RTKernel for DOS Demos
The free RTKernel demos listed below contain executable RTKernel demo programs including source and additional documentation about RTKernel for DOS.
preview: http://www.on-time.com