I just finished LuaUpload.
It lets you upload a program over serial and save it to a ESP8266 running ZeroDay's Lua interpreter.
I have some planned features, reply if you want others:
- "Raw" upload - don't save, just run the program
- Telnet mode - Upload to a telnet-enabled ESP8266
- Secure Telnet mode - Custom Lua program receives encrypted Lua program over Telnet
Let me know what you think!