A quick note – I have made all of my sites secure (https://) and so the original OTA site for my ESP8266 ROMS (www.scargill.net) is no longer appropriate. roms.scargill.net is now the place to go (which redirects elsewhere and also has a pretty interface) – sorry for any inconvenience. The files are not seen if you visit the site, just a home page - you simply enter the name of the site followed by slash and the rom name - for example... roms.scargill.net/rom.bin
Files available are:
blank.bin and esp_init_data_default.bin are needed for utterly blank ESP12 units.
rboot.bin and rom.bin are for my new ESP8266 code (which no longer supports ESP-01)
rboot.bin and romx.bin are for my older ESP8266 code (no longer developing that version but it is fine and might run fine on an ESP-01 without OTA)