modules and boards - esp8266-modules-dat - ESP8266-board-dat
hardware and software - ESP8266-HDK-dat - ESP8266-SDK-dat
peripherals
debug - ESP8266-debug-log-dat - ESP8266-error-log-dat - ESP8266-boot-log-dat
ref
Module datasheet please see here: https://github.com/Edragon/ESP8266-HDK/tree/master/MOD