The toolbox
80 tools worth knowing about if you build with AI. No affiliate links, no paid placement, and no prices quoted — tiers change monthly and a stale price helps nobody.
Claude Code
paidAnthropic's terminal-based coding agent that reads, edits and runs code across a repository from natural-language instructions.
Best for: Agentic coding in the terminal
OpenAI Codex
paidOpenAI's software engineering agent that works on tasks in a sandboxed environment via CLI, IDE or the cloud.
Best for: Delegating tasks to a cloud agent
Gemini CLI
open-sourceGoogle's open-source command-line agent that brings Gemini models into the terminal for coding and file tasks.
Best for: Free terminal agent with Gemini
Cline
open-sourceOpen-source VS Code extension that runs an autonomous coding agent able to edit files, run commands and use the browser.
Best for: Bring-your-own-key agent in VS Code
Roo Code
open-sourceOpen-source VS Code agent with configurable modes for architecture, coding, debugging and custom workflows.
Best for: Customisable agent modes
Aider
open-sourceCommand-line pair programmer that edits code in a local Git repository and commits its changes automatically.
Best for: Git-native CLI pair programming
OpenHands
open-sourceOpen-source platform for software development agents that write code, run commands and browse the web in a sandbox.
Best for: Self-hosted autonomous dev agents
Devin
paidCognition's autonomous software engineer that picks up tickets, opens pull requests and reports back asynchronously.
Best for: Async ticket-to-PR workflows
Jules
freemiumGoogle's asynchronous coding agent that clones a repository into a cloud VM, makes changes and proposes a pull request.
Best for: Background tasks on GitHub repos
Amp
paidSourcegraph's agentic coding tool available in the terminal and as an editor extension, with team sharing built in.
Best for: Team-shared agent threads
Amazon Q Developer
freemiumAWS coding assistant and agent for the IDE and CLI, with support for code transformation and AWS-aware tasks.
Best for: AWS-heavy codebases
Lovable
freemiumPrompt-driven app builder that generates and deploys full-stack web applications from a chat interface.
Best for: Going from prompt to live app
Bolt.new
freemiumIn-browser AI builder from StackBlitz that scaffolds, runs and deploys full-stack apps without local setup.
Best for: Browser-based full-stack prototyping
Replit
freemiumCloud development platform whose agent builds, runs and hosts applications directly in the browser.
Best for: Building and hosting in one place
Model Context Protocol
open-sourceOpen standard for connecting AI agents to external tools, APIs and data sources through a common server interface.
Best for: Wiring tools into any agent