The best open source alternative to Story Architect (STARC) is Manuskript. If that doesn't suit you, our users have ranked more than 50 alternatives to Story Architect (STARC) and ten of them is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Story Architect (STARC) are bibisco, Fantasia Archive, Hammer Editor and Trelby.
Open-source software offering a hierarchical outliner, distraction-free editor, character management, plot tools, Snowflake method support, section multi-organization, customizable writing workflows, cross-platform availability, and export to standard formats.
Desktop application for novel structuring, offering chapter and scene management, distraction-free text editing, detailed timeline, character interviews, multilingual support, export to publishing formats, revision history, relationship diagrams, and writing goal tracking.
Free offline worldbuilding and story creation tool with dozens of templates, complex tagging options, document linking, and project-wide search. Template examples: characters, places, events, religions, currencies, magic, species, languages.
Trelby is simple, fast and elegantly laid out to make screenwriting simple. It is infinitely configurable.
trelby is free and even though it's discontinued it's got good features
Scrite is an open-source screenwriting application based in Bengaluru, India. Unlike most screenwriting tools designed primarily for English, Scrite natively supports Indian language screenwriting; at launch it supported 11 Indian languages including Tamil, Malayalam, Kannada...
Looking for a suite of tools for writing your book? This is not just a text editor it does so much more. Organise your story using timelines, planning boards and the snowflake tool, all integrated to make writing intuitive and fun.
Fountain is inspired by Markdown syntax, intended as a simple markup syntax for writing, editing and sharing screenplays in plain, human-readable text.
SolidWriting offers an intuitive interface and powerful features for creating and editing documents. Easily open, edit, and save SWDOC/SWDOC64 and DOCX files. With advanced text formatting, offline AI assistance, and multilingual support, streamline your writing process.
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Manuscript is more of a general purpose writing tool. It's not as pretty, but it has plenty of features overall, and doesn't lock any of them behind a paywall. It also (at least so far) hasn't bought into the AI (theft of intellectual property) hype.