The Triangle Choke
It's a known technique in judo as well. The triangle symbol, represented on many BJJ logos
Rear Naked Choke
It's a very basic choke. Lot of martial arts covers this technique and the defense of it.
Omoplata
This is a shoulder lock, ashi-sankaku-garami, "triangular entanglement”
The Kimura
It's a judo move: reverse ude-garami arm lock, which is often called the "Kimura" in BJJ. The name comes from Masahiko Kimura a japanese judoka.
Guillotine
It's a frontally applied choke, which can affect your breath and bloodflow as well, depends on the details of the application
Ezekiel Choke
Mainly a gi choke
Arm Triangle Choke
An very effective head and arm choke
Americana
A basic move, puts rotation on the shoulder as an opposite angle than the kimura
The Straight Armbar
This submission is the hyperextension of the arm and elbow joint.
You can apply it from almost any position with some cleverness, most popular from mount and guard, or even from escaping from bottom side control.