WIZ820io & Micro SD Card Adaptor
This adaptor allows you to easily use gigabytes of SD card flash memory and/or a Wiznet WIZ820io ethernet module with Teensy 3.0 or 3.1.
Intro to the WIZ820io Module – by Ben Roberts
The WIZ820io is the main component on the Arduino Ethernet Shield, and consists of two main components: An RJ45 Ethernet connector and a W5200 chip.
uCProbe and Ethernet shield
uC/Probe is a PC program by Micrium Inc. that is designed as a visual debugging aid for embedded systems.