Places to Look
Broadway Licensing Plays and Musicals
Music Theatre International  Musicals
Concord Theatricals Plays and Musicals
Theatrical Rights Worldwide Musicals and some Plays
Playscripts Plays
Youth Plays Plays and Monologues/Scenes
Theatrefolk Plays and Monologues/Scenes
Dramatic Publishing Plays
Dramatists Plays
Uproar Theatrics Plays and Musicals
Stage Partners Plays and Monologues/Scenes
EDTA Rights and Licensing Information
Thespy Guide Includes Rules and Rubrics
Some reminders
All performance pieces should be from a play intended for the theater, not movies, poetry, or anything else.
Avoid Google, often times hard to prove their from a play/musical
No Joseph Arnone, Gabriel Davis, Kelli Powell, avoid DM Larsen
The Monologue Blogger is not a place to use.