Developer Tools Tools

Scalebrowser is self-hosted browser infrastructure for AI agents. It gives each agent a persistent, isolated identity, keeps logins and passkeys intact, handles captchas and verification, and runs on hardware you control.

Tidy is an open source alternative to Figma and Paper for designers, engineers, and AI agents. Design interfaces directly from your coding harness (Claude Code, Codex, Opencode, etc), explore the source code, and adapt the tool to fit how you work.

Toad lets Claude, Claude Code, Cursor, or any MCP client run commands and work with files on all your machines through one MCP server. Install a small service on each machine. No open ports, and every change asks for your approval.

Skisso is a free Chrome extension for designers and developers who build with AI coding agents. Point at any element on your live product and edit it in your own design system: your tokens, your components, a shadcn/ui kit that matches your styles. Then hand your agent only the exact change, as a small diff or over MCP. No more describing pixels in prose or pasting the whole page: about 380 tokens instead of 25,700 in our test. Runs locally, no account.

Put a QR code on your site, receipt or status page. People scan it with the free Nudgebox iPhone app and choose what to hear about. No account, email or phone number. Your backend reaches them with one HTTPS call. No SDK, no device tokens.

Atelier makes your Claude plan last: Codex finds the problems and Claude only judges them (about 71% fewer Claude tokens per review), long chats hand over to fresh sessions, and every session starts from a short brief. Every app you make keeps its tasks, releases, feedback and memory here, and you approve finished work. Native Mac app, 7 days free.

Palomino is a fast, GPU-rendered agent workspace. Run agents side by side with your terminals, editor, and browser in one window.

Helicon gives Muse Code, Meta's coding agent CLI, a proper home: projects and sessions in one sidebar, readable approvals, inline diffs and your plan meter. Free, MIT, no API key. Windows (no WSL), macOS, Linux, VS Code. Unofficial, not affiliated with Meta.

iKnowMyMac is a native Mac app that tells you why your Mac is slow, what's filling your disk and what's draining your battery, with the evidence and one action for each. It also updates your other apps from one tab. One-time purchase, no subscription.

Open-source tools for teams on Claude Code, Codex, Cursor, and Kiro. Harness Recommendations finds what’s broken in your agents’ rules, skills, hooks, and permissions, and what’s missing based on your team’s sessions. Control Plane ships fixes team-wide.

Meta's open weights model built for coding and agentic work. 816B total parameters with 42B active, a 1M token context window and native multimodal input. Download the weights on Hugging Face or run it on two M5 Ultra Mac Studios with MLX.

Pomerado turns any website into a MCP / API in minutes. Automate everything by turning previously inaccessible websites (like Google Flights, Zillow, Instacart, legacy portals) into native tools for your agents. Our open-source tool builds, hosts, authenticates, and maintains your integrations, so you can focus on building.

Parallax runs your coding agents for you. Claude Code, Codex and 40+ more in one app, with 240+ models on your own subscriptions. Captain handles the busywork, fast merge ships your PRs in one click, and when a subscription runs out, auto fallback enables your work to move to the next.

Harness is the open-source command center for coding agents. Claude Code at work, Codex at home, Hermes in the cloud: every agent on every machine, side by side. Use the native desktop app, hn in your terminal, or the iOS and Android app to answer agents by voice. End-to-end encrypted. Then go beyond code with 49 harnesses for CAD, circuits, robots, games and music. Free on Mac and Linux.

CmdRound is an assessment platform for hiring managers. You send a candidate a link and they get 55 minutes with Claude Code to implement industry-standard work in a real codebase. Each task is tailor-made to measure how good a candidate is at combining their engineering skills with agents. At the end of the assessment you get a score on four plain questions and a replay of every call they made. Scoring is rule-based, with no LLM judge. $49 for 10 candidates, one-time, lasts a year.

Ubuntu 26.10 "Stonking Stingray" brings GNOME 51, expanded hardware support, and a complete switch to Rust-based coreutils. App Center unifies Snap and Debian package details and adds graphics driver management. An optional Myna preview offers local speech-to-text. A non-LTS release for developers and Linux enthusiasts who want newer software between long-term releases.

CodeCrab is your local-first AI code review assistant. This version connects seamlessly with GitHub, GitLab, Claude, Codex, Cursor, and Copilot CLI. Drill into every exact change with our new Finding Deep-Dive & Follow-Up feature to inspect, question, and refine AI suggestions without leaving your workflow.

Observability built for NestJS by its creator. Add the SDK and a key, and every request shows up as a trace of your own controllers, providers and queries, with errors, jobs, logs and runtime metrics alongside. Free up to 300k events a month.

Navige uses Sufficiency Intelligence to cut AI agent costs while work runs. It sends suitable requests to smaller models, caches repeated reads and trims bulky tool results. If unsure, it keeps your chosen model. Set budgets, catch runaway loops and approve sensitive actions. See costs and savings by job, with estimates clearly labelled. Watchtower is free forever. Preview changes before switching controls on.

Buddy Sandboxes give AI coding agents their own isolated Linux machines to build, run, test, and fix apps without touching your local setup. Each Sandbox has a persistent disk, root access, Docker, SSH, and a public URL. Create one per task, branch, or PR, then let your agents manage it through MCP, CLI, SDK, or API.

The relaunch of SuperLocalMemory, rebuilt from the ground up and backed by four arXiv papers. One local-first memory brain for Claude Code, Codex, Cursor, ChatGPT and any MCP or CLI agent. It never bluffs: recall says supported, related or no answer, checked by Laya on your Mac or Jev online. Find pictures and PDFs by describing them, with Google’s EmbeddingGemma 2. Governed, mesh-connected, AGPL-3.0. Built by Qualixar, the AI Reliability Engineering lab behind 10 open-source products.