Alternatives to Tortie

Open-source Agent Development Environment (ADE) for running Claude Code, Codex, OpenCode and other coding agents side by side in isolated worktrees.

Terminal-based AI coding agent designed for large, multi-step tasks. Plans and executes across dozens of files with up to 2M tokens of context, MIT licensed.

HKUDS open-source registry that turns GUI apps, APIs, and SaaS tools into agent-native CLIs for OpenClaw, Claude Code, Codex, and Cursor.

Open-source coding agent for VS Code and JetBrains. Apache-2.0, local models, CLI, and MCP. Acquired by Cursor; the repo stays public.

JetBrains' LLM-agnostic AI coding agent that ships code from your terminal, IDE, or CI/CD pipeline, with bring-your-own-key model support.

Polyglot CLI that installs project tools, loads env vars, and runs tasks from one mise.toml. asdf-compatible, Rust-fast, MIT-licensed.

MIT open-source coding agent for terminal, IDE, and desktop. 198k GitHub stars. Bring any model, or use free included models and Zen.

An open-source Spec-Driven Development toolkit that makes specifications executable. Works with Claude Code, GitHub Copilot, Gemini CLI, and Codex to keep agents on task.

Open-source agent harness control surface for Claude Code, Codex, Cursor, Grok Build, and OpenCode with desktop, web, and mobile apps.

Open-source terminal pair programmer. Apache-2.0 and BYOK. You pay the model API, not an Aider seat.

Open-source VS Code/CLI/SDK coding agent. Enterprise custom. Not a Claude 3.5 Sonnet wrapper.

omp (Oh My Pi) is a batteries-included terminal AI coding agent built on Pi: hash-anchored edits, native LSP refactors, DAP debugging, browser automation, and first-class subagents.

Minimal MIT terminal coding agent by Mario Zechner. Thin tool surface, extensions, multi-provider models; you pay only for API usage.

Antigma Rust harness. Public repo Apache-2.0; binary free in preview. CLI $0 plus BYOK or local GGUF. Not a $20 seat.