ESP8266 Projects

You can get a lot of great ideas from other people. Not all of these contain an ESP8266, but they all triggered my interest in some way.

Wifi jammer/deauther

People point out that you can get into trouble with the law with one of these.

ESP as a remote microphone

Someone did this using a PIC in conjunction with an ESP8266, but I see no reason in the world why this could not be done with the ESP8266 alone.