Comprehensive Game Collections

GorgoBase - A collection of 2.81 million games made from all TWIC files and all PGN Mentor files.  SCID format only.  Last update: 11/21/2015, TWIC #1097

Tactics Collections

• Auerswald Collection, 3500 tactics (PGN format)

Anki Flashcards

• Bishop and Knight Checkmate Flashcard Set
• Lucena Endgame Position Flashcard Set

Other Useful Downloads

• Chess Position Trainer 3.3 - old free version (tough to find now)
• ChessBase Light (2009) - free version (tough to find now--coming soon)
• 101 Essential Chess Tips (pdf) - author unknown
• Elo Spreadsheet - written by tjradd.  Add new players to columns H+, add game results to line 3+