Ayakaleaf Pro

Lexicon is a free, open-source, local-first writing assistant and distraction-free rich-text editor for Windows, macOS, and Linux. It provides inline proofreading through the separate LanguageTool engine, while local AI tools handle rewriting, tone adjustment, summarization, and other writing tasks without requiring an account or cloud writing service. Users can review suggestions in a dedicated panel, format drafts with rich text and LaTeX, autosave work, and export it to Markdown, HTML, text, or PDF. The app can download and run a local AI model or use an existing local Ollama server; the editor and proofreading tools work without an AI-model download. It is MIT-licensed, and the repository notes that its Windows builds are unsigned and its macOS build is pre-release and unsigned.

OpenPencil is an open-source, local-first design editor and Figma alternative developed as a programmable toolkit. It opens and writes native .fig files and supported .pen documents, supports components, variants, auto layout, CSS Grid, real-time peer-to-peer collaboration over WebRTC, and exports designs to formats including SVG, PDF, HTML, JSX, Tailwind JSX, Storybook stories, and .fig. Its built-in AI assistant uses more than 100 tools to create and modify design nodes, manage components and variables, analyze design tokens, and export assets. Users provide their own API key for supported providers such as OpenRouter, Anthropic, OpenAI, Google AI, DeepSeek, Z.ai, and MiniMax. A headless CLI can inspect document trees, query nodes with XPath, run Figma Plugin API JavaScript, lint and analyze files, convert formats, import HTML/CSS as editable layers, and control the running editor. An MCP server exposes design inspection, modification, and export tools to coding agents and other MCP clients, while a headless Vue SDK supports custom editing surfaces. OpenPencil runs as a Tauri desktop application for macOS, Windows, and Linux, as well as a browser PWA, and is available through Homebrew, downloadable releases, and the web app. The project is in active development and is licensed under the MIT License; its optional cloud server and administration components use the Apache License 2.0.

Alexandrie is a self-hosted, open-source knowledge base and wiki for teams and individuals, positioned as an alternative to Notion, Confluence, and Obsidian. It uses an extended CodeMirror 6 Markdown editor with support for LaTeX, custom containers, interactive checkboxes, snippets, speech-to-text, and embedded diagram creation. Notes are organized through multi-tenant teams, workspaces, categories, and nested documents, with full-text search, a command center, integrated Kanban boards, public links, and node- or workspace-level permissions ranging from no access to owner. It is distributed as an offline-first progressive web app with synchronization, OIDC/SSO support, Docker deployment, backup and restore pipelines, and S3-compatible media and backup storage.

PenEcho is an open-source shared canvas for handwriting, equations, diagrams, and spatial context. It reads marks and their spatial relationships on a 20,000 × 20,000 canvas, then places hints, explanations, formulas, plots, diagrams, and other AI-generated drafts beside the original content. Drafts can be moved, resized, copied, accepted, or discarded before becoming part of the canvas ink; users can draw with a stylus or mouse, lasso confirmed ink to move, resize, recolor, or delete it, and send selected content to Typeset without triggering an AI request when editing ordinary ink. The application supports editable sandboxed HTML widgets, professional diagrams, animations, and live-data plugins, which can be refined in place through incremental unified-diff edits rather than full regeneration. It supports up to ten API or CLI connections, including Kimi, MiniMax, Codex, and Claude Code configurations, with a selectable active connection per client. Canvases can be organized into projects, shared across authorized devices, and exported as cropped PNG files. PenEcho provides a desktop app and an npm installation requiring Node.js 20.3 or newer. It can run offline with a user's own API or authenticated CLI setup; API credentials remain on the host device and are not sent to browser code. PenEcho Cloud is an optional companion service for private versioned projects, synchronized favorites, linked-device remote access through a relay, and public sharing of Canvases and Widgets as Echoes or Crafts. The project is supported through Moonshot AI's Kimi Open Source Friends program.

SurfSense is a free, open-source desktop application and NotebookLM-style AI agent for researching, transforming, and editing documents on the user's machine. It indexes files locally, supports local or OpenAI-compatible remote models, and returns cited answers from sources including PDF, Word, Excel, PowerPoint, CSV, image, Markdown, plain-text, and HTML files. It can create or edit documents as copies, fill and flatten PDF forms, add watermarks and page elements, merge or split PDFs, modify tracked Word changes and comments, edit spreadsheet values and formulas, transform sources into PDFs, podcasts with transcripts, mind maps, flashcards, and quizzes, and use OCR for supported scanned documents and images. The application is distributed for Windows, macOS Apple Silicon, and Linux; it has no account requirement, uses an Apache-2.0 license, and can run offline or air-gapped when paired with a local model.