If you're looking for a Scene One alternative, Novelcrafter is a great choice. It's a full-featured writing environment with a personal Wiki (Codex) for keeping track of story details, different writing modes, and AI tools for outlining and editing. It's good for both planners and pantsers, with features like customizable tags and labels, and the ability to set AI context and prompt settings.
Another top contender is LivingWriter. This cloud-based tool lets authors organize their manuscripts with a clean drag-and-drop interface and smart text features. It's got an AI Outline Generator and syncs across multiple devices with no hiccups. LivingWriter also offers encrypted cloud storage and a range of subscription tiers to suit different needs.
If you're looking for a general-purpose AI writing assistant, Sudowrite could be for you. It uses large language models to help with idea generation, outlining, writing and editing. Sudowrite's tools include features like Story Bible, Write, and Rewrite to help you get past writer's block and improve your writing workflow.
Last, ProWritingAid has a range of AI-powered tools to help with style, structure and impact. It integrates with many writing tools and offers detailed story critiques and real-time checks for grammar, readability and plagiarism. ProWritingAid is geared for professional writers, students and businesspeople who want to improve their writing.