Improvisational

Wellhungjury.com
Arts, Performing Arts, Comedy, Improvisational - Well Hung Jury. Austin, TX, experimental improv group that performs such long-form shows as Texas Chainsaw Musical and 1,000 Words.
http://www.wellhungjury.com
Pavlov's Dogs - Improvisational Comedy - Dallas, TX
Arts, Performing Arts, Comedy, Improvisational - Pavlov's Dogs. Dallas-based troupe has info about shows and performers, as well as topical rants and links to other Web sites that intrigue them.
http://www.pdogs.com/
Melodramix
Arts, Performing Arts, Comedy, Improvisational - Melodramix. Alberta, Canada, improv troupe lists their schedule and information about auditioning.
https://melodramix.tripod.com/
Friday Nite Improvs
Arts, Performing Arts, Comedy, Improvisational - Friday Nite Improvs. Pittsburgh show in which not only are the suggestions coming from the audience, but so are the performers.
http://fnipgh.com
Legendary British company that laid the groundwork for Whose Line Is It Anyway? and launched the careers of Josie Lawrence and Paul Merton.
Comedy Store Players - Josie Lawrence, Paul Merton, Neil Mullarkey, Lee Simpson, Andy Smart, Jim Sweeney, Richard Vranch - with frequent special visits from Tony Slattery, Greg Proops, Mike McShane, Phill Jupitus, Stephen Frost, Steve Steen - official web site of this acclaimed improvisation group The Comedy Store Players - London and Manchester.
https://www.comedystoreplayers.com/
Ad-Libs
Arts, Performing Arts, Comedy, Improvisational - Ad-Libs. Dallas troupe with weekly shows and national tours.
http://www.ad-libs.com/
Chicago Improv Festival
Arts, Performing Arts, Comedy, Improvisational - Chicago Improv Festival. Annual improv festival with a focus on performance and workshop study.
http://www.cif.com/