Top ALTER GitHub Repositories & Tools (2026)

Open-source, self-hosted enterprise & site search server built on OpenSearch. Crawls web / file / DB / cloud sources, 20+ languages, REST API, and AI/RAG & semantic search. Apache-2.0.

A markdown editor — and the bridge to your LLM. Local-first, MIT, ~15 MB. Bundled MCP server lets Claude Code / Codex / Cursor drive your vault directly. 14 AI providers BYOK.

The Notepad equivalent for Markdown

Open-source dots for the web: an AI agent with its own browser, one that does not get blocked.

Control how your documents get signed

A lightning-fast, modern, local-first SSH/SFTP/Serial client. Real-time E2EE sync, Team vaults, live sharing, plugins and more. Open-source Termius alternative for Windows, Linux, macOS & Android. Built with Rust/Tauri.

The open-source Render alternative — AI-native. Git push → build → deploy on your own infrastructure; agents are first-class users.

Cut your AI coding agent's token bill on three axes: terse prose, YAGNI-first code, and tool-output compression. Claude Code, Pi, Cursor, Codex, Gemini + 4 more. Zero deps, published benchmarks including the runs it loses.

Devopness: AI DevOps on your cloud. Deploy apps, infra and CI/CD. Any cloud and any stack, one MCP. Deterministic API, opinionated and fully configurable. No cloud credentials in AI chats. Free plan.

AI pair programming in your terminal — one static binary, sub-ms startup, any model

End-to-end encrypted notes, tasks, files, passwords, journal and bookmarks. Keyed by a 12-word BIP-39 phrase: no email, no password, no account to leak. The full client source for web, desktop and mobile is published, along with the encryption (XChaCha20-Poly1305, HKDF-SHA256, Ed25519) and the threat model, so the privacy claims are falsifiable.

a fast, rootless container runtime and sandbox with no daemon. It runs workloads, including agent tool calls and code generated by an LLM, in real containers enforced by the kernel.

Kition brings Markdown, DataTable, WhiteBoard, a tool-using AI agent, browser research, and visual workflows into one desktop workspace.

Typeflux is a macOS menu bar voice input tool built with Swift. It is designed for a fast "hold to talk, release to insert" workflow: press a hotkey, speak naturally, let the app transcribe your speech, and send the resulting text back into the currently focused app.

Open-source, self-hosted photo and video galleries for photographers and events, with client proofing, password protection, guest uploads, custom branding and Docker deployment.

Open-source, frictionless CAPTCHA and bot defense. A privacy-focused alternative to reCAPTCHA and hCaptcha.

Self-hosted, censorship-resistant VPN with REALITY / anti-DPI obfuscation and post-quantum (X25519 + ML-KEM-768) crypto. Rust core + native Android/Windows/macOS clients. Works on networks with active DPI (Iran, China, Russia).

Open-source Frame.io alternative

Reactive HTML attributes. No build step, signals-based, CSP-safe.

Forme is a document engine for JavaScript, written in Rust and compiled to WASM. Render the HTML and print CSS you already have, or author React, Svelte, Vue, and Preact components. Paginated PDFs in-process - no headless browser.