Chess Openings Trainer Lite - Apps on Google Play

Best 5 free Chess Software - Chess Forums

The Classical Sicilian Defense - Chess Opening Trainer on DVD

Chess Position Trainer - Study and Practice Chess Openings

Chess Position Trainer Tutorial: Using Chess Engines

The Slav Defense for the Tournament Player: Expert Knowledge - Chess Opening Software on DVD

Lichess just added opening training (in addition to their tactics trainer). Check it out! : r/chess

I made an interactive trainer for learning the queens gambit opening, including 86 variations : r/chess

Foxy Openings - Volume 180 - Domination Studies - Bernhard Horwitz for the Tournament Player - Vol. 3

Chess Chess TRainer

datajunkie's Blog • #4: Lifetime Repertoires: 10 Things to Avoid when Learning Openings on Chessable •