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.

Mocana NanoSec Embedded IPsec / IKEv1 / v2 / MOBIKE

tutorial    

Xilinx Education Home - FPGA, DSP, SOC and More
As a leader in the FPGA space, Xilinx offers a number of courses on how to learn and use its technology. Admittedly, they are by Xilinx, for Xilinx - designed to promote Xilinx technologies. Courses are arranged worldwide, and are on a paid basis only. FPGA Design DSP Design High-Speed Serial Design Embedded Systems Development PCI Design. Also some online training.
preview: http://www.xilinx.com  

tutorial    

Al Williams Tutorials - PIC, Basic Stamp, FPGA's
My microcontroller projects including PAKs, a PIC programmer, and more. Includes our famous Basic Stamp Project of the Month, and Basic Stamp emulator. My ham radio site that has projects and other items of interest to hams and electronic folks. Includes the famous Basic Stamp FAQ. A 'Wiki' web that allows you to build pages related to electronics.
preview: http://tutor.al-williams.com  

tutorial    

AWCE Classroom
Online tutorials and demo type information - Embedded Systems Using the APP-IV with GCC Getting Started with the PIC 18F Family Electronics Basic Circuits Programmable Logic RoadMap to Programmable Logic
preview: http://www.awce.com  

tutorial    

Free Report - FPGAs, Tools, and Boards
FPGAs are increasingly found in embedded systems ranging from medical to military to network infrastructure. This online PDF tutorial overviews the FPGA ecosystem, analyzes survey data from real users, and has interviews with leading vendors. If you are considering FPGAs, this report is a 'must download.' Due to generous vendor sponsorship, this report is availble for FREE for a limited time.
preview: http://www.fpga-report.org