A project is not open source unless it comes with (explicit) Open Source license. Please add a LICENSE file which discloses licensing terms (as this repository contains multiple projects, each of them should rather have separate LICENSE file (consider a case of someone tarring up a subdirectory); also consider splitting up different projects to separate repos).
while your premise is incorrect, the suggestion to add a license is sensible (I did for esptool2, but didn't think to do so for the rest), it will be done...
From https://github.com/raburton/esp8266/blob/master/rboot/readme.txt :
A project is not open source unless it comes with (explicit) Open Source license. Please add a LICENSE file which discloses licensing terms (as this repository contains multiple projects, each of them should rather have separate LICENSE file (consider a case of someone tarring up a subdirectory); also consider splitting up different projects to separate repos).
Thanks.