Tor can have different meanings. Some understand Tor as
the software (which can be Tor Browser or only Tor)
To clarify someone invented vanilla Tor for Tor the software. The thing you can download and build from https://gitweb.torproject.org/tor.git/. It is also sometimes called little-t-tor.
TOR has an option named OBFS (obfuscator) and it is designed to bypass possible filtering by ISPs in accessing TOR. Actually it an option from pluggable transport.
I've put a screenshot of where to find it. Firstly click ...