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| International Softball Congress | Home of the ISC. |
| 2010 ISC World tournament | The host committee for the 2010 ISC World Championships is eager for fans and tournament participants to see all the surprises, events, and excitement that Midland is going to have on display! The dates for the tournaments are Saturday, August 14th through Saturday, August 21st, 2010. |
| 2011 ISC World tournament | The official site for the 2011 ISC world championships |
| 2014 ISC World Tournament | The official site for the 2014 ISC World Fastball Tournament |
| Huron County Fastball League | An Ontario league with teams in Wingham, Blyth, Goderich, Belmore, Walton, Exeter, Zurich, Brussels, Wroxeter and Fullerton. |
| Tri-County Mens Fastball League | An Ontario league with teams in Woodstock, Innerkip, Ayr, Norwich, Harwood, Simcoe, Ingersoll, Oxford Centre, Hickson, Burgessville, Straffordville, Pt. Burwell, Mt. Elgin and New Dundee. |
| KW Ladies Fastball League | The KW Ladies League is dedicated to women who are 17 or older. The league is based in Kitchener, with games being played at three diamonds in the city. Games are played from Monday to Thursday in a double header style, with each team playing two games a week. |
| NCAA Womans Softball | |
| Blackburn Mens Fastball League | |
| Greater Ottawa Fastball League | |
| Burlington Intermediate Men's Fastball League | |
| Ontario University Softball | The Ontario University Softball League is made up of 12 member clubs from universities across Ontario. Most of the competitive clubs that are in our league are either self-funded or partially funded programs at their respective schools. |
| Kitchener Waterloo Umpires Association | Welcome to the Kitchener Waterloo Umpires’ Association web site. We are umpires who are affiliated with Softball Ontario and its organizations. |
| Kitchener Minor Girls Softball Association | |
| Wilfrid Laurier University Womens Fastpitch Softball | |
| Kitchener Waterloo Umpires Association | Welcome to the Kitchener Waterloo Umpires’ Association web site. We are umpires who are affiliated with Softball Ontario and its organizations. |
| Maddy's Photos | Maddy Flanagan is the official photographer for Fastpitchwest. |
| Als Fastball News List | News on both the senior and intermediate sides of fastball. |
| Softball Canada | |
| Eastern Ontario Fastball Blog | A blog dedicated to news about the Greater Ottawa Fastball League and other happenings in the world of fastball in eastern Ontario and western Quebec. |
| Fastpitch West | FastpitchWest is an online publication, produced by Jim Flanagan in Southern California. |
| Ontario Amateur Softball Association | The Ontario Amateur Softball Association is recognized as a preeminent developmental body for softball in Canada. |
| Kitchener Minor Boys Softball Association |