WIZnet Co., Ltd, is a fabless IT company that provides Internet processors for the IoT.

WIZnet is the sole innovator to patent the hardwired TCP/IP technology into a microprocessor chip in 2001. Since then, a yearly average of 10 million WIZnet chips have been used in various embedded Internet devices worldwide.

WIZnet is the trend leader of Open Source Hardware. Our unique solution, Hardwired TCP/IP technology, in Arduino’s Ethernet Shield has been recognized as de facto standard for IoT. We can summarize the main features of Hardwired TCP/IP as Unattackable, High Performance and Easy to Use.
(Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. WIZnet’ chip and module are being used in the Arduino’s Ethernet Shield, and adopted in its clones.)

WIZnet provides various network protocol libraries and useful tutorials / application examples. [Source: wiznet.io]