Chess Openings Trainer by Piero Toffanin

Web Apps

Chess Openings Trainer - Quick Start Guide

Chess Position Trainer - Lubbe Schach

GitHub - davidgma/chess-opening-trainer: Obsolete: Training program to help learn chess openings.

Opening training with Fritz 17

Chess Trainer Hub - RagChess

Catastrophes & Tactics in the Chess Opening Workbook - Vol 1: Indian Defenses: Tactical puzzles to help exploit opportunities and avoid disasters in (Winning Quickly at Chess Workbook Series): Hansen, Carsten

Fritz Opening Trainer: Unorthodox Chess Openings

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

FOXY OPENINGS - VOL 116 - 10 Easy Ways to Get Better