IP Relay Boards and Modules. Support Web, SNMP, TCP/IP, Telnet, VSP (Virtual Serial Port). They may be controlled via Internet, Ethernet or Wireless Wi-Fi 802.11 interface. They have Digital and Analog Inputs. Suitable for Home Automation, Industrial and Remote Control. For some of them there is Android application for control from smartphone
Comparison table with differences between Ethernet Web Relay Boards