Celtx

Celtx is a scriptwriting and pre-production application used by filmmakers, playwrights, and media producers. It supports standard script formats including screenplay, stage play, AV, and comic book scripts, and includes production scheduling and breakdown tools. Originally released as an open-source desktop application, it later transitioned to a cloud-based platform.

Click any badge for full per-format details - what it is, how to open it and how to convert it.