From DeepReinforce, Ornith hands task writing, scaffolding and solution writing to the model itself, comes in three sizes from 9B to 397B, and ships under MIT with a 256K context and local deployment.

An open source desktop companion that sends several agents into their own branch worktrees, meters the context each one burns, and keeps the diff and the editor in the same window.

GitHub Copilot walks a task from assignment to an opened pull request: it cuts the branch, commits, reviews its own patch and runs the scans, and several agent sessions can work side by side.

Describe the outcome instead of the next line: the agent reads the whole repository, edits the files, runs commands and repairs what it broke - and for bigger jobs a coordinator plans, hands pieces to parallel agents and brings the result back.

An open version of a well-known online tool, rebuilt so the model is yours to choose: code runs inside a Node.js sandbox in the browser tab, dependencies install, a development server starts, and the result appears in a preview beside the conversation. Output arrives as discrete steps, so a failure can be repaired at the step that broke.

An AI pair programmer that lives in the terminal, so the editor never has to be opened. It reads the repository, proposes a change, applies it, runs the tests, and commits every modification to version control with a written message, leaving a clean path back. Free and open source; only model calls cost money.

An open coding agent that lives in the editor. It reads the project, proposes a plan, and only then touches files; every change leaves a checkpoint you can revert. You supply the model key, so nothing is marked up and no repository leaves your machine. Also available as a command line tool and a library.

A deliberately small coding agent for the terminal: four tools, a system prompt under a thousand tokens, and everything else left to an extension system the agent can write for itself. No built-in planning mode, no task list, no bundled tool servers, and a clear account of why each was left out. Free and open source.

A terminal coding agent in a single statically linked binary, designed around one constraint: keeping the beginning of a conversation byte-for-byte stable so cached input stays cheap. Long sessions, a plan to approve before anything is written, per-turn checkpoints and automatic repair of malformed tool calls. Free and open source.

An open source coding agent that runs in the terminal, a desktop window or an editor sidebar, works with dozens of model providers including local ones, lets you sign in with a paid subscription you already have, and states that it stores none of your code.