developer tools Tools
2101 best developer tools tools and apps, curated and ranked by community upvotes on ProductCool. Updated daily as new developer tools products launch.
Tracellm is an observability platform for production AI applications. Monitor prompt execution, token consumption, latency, spans, errors, and model calls across your LLM workflows. Export traces using OpenTelemetry (OTLP) and quickly identify bottlenecks before they impact users
ps, top and lsof tell you what is running. witr tells you why. Point it at a process, PID, port, container or file and it traces the chain that explains it - systemd, supervisor, shell or cron - plus who started it, when, from where, and the warnings worth knowing. Run it bare for an interactive TUI with Processes, Ports, Containers and Locks tabs. Or script it: --short for a one-line chain, --json with real exit codes. One static Go binary for Linux, macOS, Windows and BSD.
You kick off an AI agent, switch tabs, and forget it's stuck or 90% through its context window. tablo fixes that, a tiny cat in your screen corner watching every Claude Code & Codex session: live context meters, tool approvals, and a nudge the second one needs you. Unlike usage dashboards, tablo tracks the conversation context filling up in real time, per session, across both tools — in a widget that stays out of your way. cozy by default. 🐱
Give agents a Linux operating system as a library – no sandboxes, VMs, or SaaS. Built on WebAssembly, the same tech powering Cloudflare Workers and Chrome. Support Claude Code, Codex, OpenCode, Pi, Eve, and Flue.
Greplica gives your engineering team and every coding agent a shared memory of the codebase. It continuously extracts decisions, constraints, gotchas, failed approaches, and file-level context from coding sessions, then retrieves only what matters for the task at hand. Unlike static docs or siloed agent memory, Greplica stays grounded in the repo, keeps knowledge fresh, and works across developers, agents, clones, and forks. It is open source, runs locally, and offers a managed shared mode.
Track Claude Code usage: cost, cache, session replay. Run `npx langwatch claude` once. Every session gets cost with cache reads/writes as separate token classes, every bash and MCP call as a span, theoretical vs billed for your Max plan, and a full terminal replay in the UI. Works for Codex too.
We just built SKI — voice coding for Claude Code, Codex and more. It's not dictation: your agent answers you out loud, like a real teammate, so you build at the speed you think. You can even bring it into a meeting to build live, or send it in your place to speak for you. It's an ambient thing that just sits on your desktop — hit a key, talk, it works. All on your machine, free. Available on Mac & Windows.
BlackFlare - a native macOS menu bar app for Claude Code and Codex. Keep your Mac awake during long runs, get notified when a session finishes or needs you, switch your defaults from the menu, and watch plan usage — all on-device.
A simple native macOS terminal built with Swift and libghostty. Minimal be design - suited for everyday use, just not packed with the bells and whistles power users expect.
MemoryCustodian gives Codex, Claude Code, Gemini, and other coding agents durable project memory—without a hosted service or bloating every prompt. Decisions, constraints, rejected approaches, and project context live as plain Markdown in your repo, where they can be reviewed, versioned, shared, and deleted like code. A manifest loads only the memory relevant to each task. Open source, local-first, and cross-agent.
Task Monki is an open-source desktop app for managing coding agents from task to pull request. Run several tasks at once, follow each agent’s progress, preview every result without manually setting up services or containers, send work to another agent for review and fixes, and bring multiple agents into the same discussion, where they can respond to each other, compare approaches, and challenge assumptions.
AI writes your code at 10× speed. Prelint makes sure it's the right code - it reviews every PR against your ADRs, docs and past decisions, and catches product drift before it ships. On teams using several AI reviewers, ~40% of the issues fixed before merge are caught by Prelint.
Lamoom is a marketplace of agent apps that run inside your own Claude - not on our servers. Install one and it works in your files, with your data. Every run is yours to see. Publish your own loops and charge per run or monthly. $20 free credit to start.
ou want a real Linux VM that: Boots in seconds, not minutes Has a desktop you can actually see Runs headless when you need it (same VM, no restart) Stays running even after you close the app Doesn't require a PhD to set up TinyBridge solves this. One command. Full Linux. On demand. Try - brew install tinybridge
Run curl qsa.sh for a one-command external security scan of your server's own public IP — naabu, nmap + vulners, and nuclei map your open ports, service versions, and known CVEs, streamed straight to your terminal in ~30 seconds. See exactly what the internet sees of your host: no account, nothing stored. Free scans run live; paid Pro (all 65,535 ports, async) and one-time Deep (the full nuclei firehose, emailed) dig deeper uncovering vulnerabilities below the surface.
Company Brain for AI agents, Fragmented communication and data of a company which is left on channels Emails, Slacks, WhatsApp and LinkedIn connect it all in one place with approval layer attach so personal and works chats don't gets mixed and connect it with any ai agents simultaneously, where records are keep getting updated minutes by minutes and so AI agents are getting updated as well so use AI agents with less cost of context and don't have to repeat.
General Intelligence Architect — describe an app and watch it get built live.
Cekura is the testing, observability, and self-improvement platform for production voice and chat AI agents. It simulates thousands of scenarios, catches failures, diagnoses the root cause, rewrites prompts and config, then re-validates with a full regression sweep. Unlike tools that hand failures back to your team, Cekura closes the loop by fixing the agent itself and proving the fix holds without overfitting.
Self-hosted Next.js/TypeScript boilerplate: full OAuth 2.1 + PKCE, API key management with zero-downtime rotation, usage-based Stripe billing, and Redis rate limiting. 7 modules, 300+ tests. One-time €79, no revenue share, no platform lock-in. The metering core is free and open source on npm.
Recipe Book is a video data platform where you can semantically search 25M+ clips, iterate on the results, and buy the exact dataset you need to train your model in one sitting. Search -> rate a few clips -> we train a probe on your votes to re-rank the whole catalog to your taste. No contact forms, no sales calls, $3/hour.
Most agents pass their evals and fail in production. Prefactor is the evaluation layer that closes the gap. We score every agent run in real time, surface quality regressions and drift as they happen, and show engineering teams exactly how their agents are performing at scale. Built for the teams shipping agents to customers.