Ethernet Nano W5100 Ethernet Shield LAN Network Module Board Micro-SD Support TCP UDP for Arduino V3.0 R3 UNO Mega 2560 One: Amazon.com: Industrial & Scientific
Amazon.com: SunFounder Ethernet Shield W5100 Compatible with Arduino UNO R3 Mega 2560 1280 A057 : Electronics
Amazon.com: DEVMO W5100 Ethernet Network Shield LAN for Ar-duino Expansion Board Module with SD Card Slot Compatible with Ar-duino UNO MEGA2560 UNO R3 ATMega 328 MEGA 1280 : Electronics