Need a way to build and learn an opening repertoire? Check out chessbook.com : r/chess

Chess Madra, the free repertoire builder, has had a makeover! Check it out and let me know what you think! : r/chess

Chess Openings Pro - Apps on Google Play

Chess Stars Publishing

Dutch Defense Chess Opening Cheat Sheet Chess Guide - Finland

Build your opening repertoire - TheChessWorld

Gambit Advanced

Chess lesson # 9: Chess notation - learn how to record your Chess games, read books and communicate

A Rock-Solid Chess Opening Repertoire for Black (Ukrainian Authors: Openings) (English Edition) - eBooks em Inglês na

Chess Opening Repertoire for White