Arialine
Arialine is an AI diagram generator and Mermaid diagram editor built for engineering and product teams working in Slack. Create flowcharts, architecture diagrams, sequence diagrams, UML, ERD, C4, swimlanes and other technical diagrams from plain language, Slack discussions, or Mermaid code. Paste valid Mermaid with /arialine and it renders without AI or usage limits. Diagrams stay editable in their Slack thread: reply to make changes, with every accepted edit saved as a version linked to the source message. Arialine includes history, undo, rewind, branching, decision context, PNG/SVG/PDF/.mmd exports, interactive HTML diagrams, Markdown-to-Slack-Canvas rendering, Mermaid 12 + ZenUML support, and an MCP server for Slack AI. It works on every Slack plan, including Free.
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Mermaid Chart
Effortlessly create complex diagrams from markdown-style text and collaborate with your team in real time using Mermaid Chart. This innovative text-based diagramming tool, enhanced by Mermaid AI, streamlines documentation processes, enhancing workflows and communication across your team. The Teams feature enables you to create projects, invite members, and maintain a unified source of truth, significantly boosting collaboration and productivity. Elevate your diagramming capabilities with Mermaid AI by writing simple prompts to generate complete diagrams in seconds. Generate sophisticated diagrams using AI, text, and visual editing capabilities, revolutionizing the way you create and manage diagrams for a smarter, more efficient workflow.
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Notula
Notula is a free WYSIWYG Markdown editor for the docs as code already in your git repository. It opens the repo as a tree of documents and edits them with no syntax on screen - no hashes, no asterisks, no table pipes, not even on the line the cursor is on - then adds the review layer a code editor has no answer for: comment on a passage, reply, mention someone, suggest an edit, resolve. A mention arrives as a notification and waits in an inbox.
Threads are committed beside the document as plain files. Nothing is written into the Markdown, and a one-word edit stays a one-word diff. Tables are edited as tables and Mermaid blocks are drawn as diagrams. It drives the git already on the machine, and never rewrites history, stages the whole worktree or switches a branch.
Free, no account, no server. macOS and Windows, no Linux build yet. The source is closed and the builds are not code-signed yet, so the first launch takes one extra step.
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Flowova
Flowova is an AI-powered flowchart generator that transforms natural language descriptions into professional diagrams in seconds. Simply describe your process, upload an image, or import a PDF, Word, or PowerPoint file—Flowova's AI automatically creates structured flowcharts with proper node arrangement.
Key Features:
- Text-to-Flowchart: Describe any workflow in plain language and get instant visual diagrams
- Multi-Format Input: Supports text, images, PDFs, Word documents, PowerPoint, and Excel files
- One-Click Auto-Layout: Automatically arranges nodes for clean, professional results
- 40+ Templates: Pre-built templates for various use cases
- Mermaid Code Support: Import and export Mermaid diagram syntax
- Cloud Sync: Access your flowcharts from any device
- Multiple Export Formats: PNG, SVG, PDF, and more
Perfect for product managers, developers, designers, and anyone who needs to document workflows quickly without design skills. No installation required.
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