I am asked often about other resources available to theatre writers. Here is a start, though not at all comprehensive!
Ontario Arts Council – Recommender Grants for Theatre Artists
Ontario Arts Council – Theatre Projects (Independent writing, or residencies)
Toronto Arts Council – Grants to Playwrights
Canada Council – Explore and Create (Research, Creation or residencies)
Diaspora Dialogues – Playwrights Mentoring Program (by invitation I believe)
THEATRE COMPANIES with writing groups
The AMY Project (Artists Mentoring Youth)
These are primarily focused on playwriting, as opposed to fiction or other types of writing, and do not include full-time diploma or degree programs.
GEORGE BROWN COLLEGE – Continuing Education
UNIVERSITY OF TORONTO – Continuing Education