IFA Premiership - Players records on the IFA Premiership official site, including a player search facility.
National Football Teams - Players participating in Northern Irish football that have played for a national football team.
European Football - Players that have played internationals for Northern Ireland.
EUFO - Northern Irish players that participate in the top tier clubs.
Football-Lineups - Recent line-ups for the IFA Premiership top tier league.
Transfermarkt - Overview of player changes and transfers in Northern Ireland.
English Wikipedia - Listing of almost 550 association footballers from Northern Ireland.