at-firmware
There are 3 repositories under at-firmware topic.
loboris/ESP8266_AT_LoBo
New ESP8266 AT-Firmware with many added features
nopnop2002/Arduino-ESPAT-TCP
TCP/UDP Applicaton for Arduino using ESP8266's AT firmware.
JiriBilek/ESP_ATMod
ESP8266 AT Firmware (Command Processor) With TLS 1.2 Capability