Builder Resources
Free Coding Tools
Seven free AI coding tools to help you build your Season 01 product — agents, IDEs, and editors you can start using today at zero cost.
OpenCode
Open-source AI coding agent
A free, open-source agent that helps you write code in your terminal, desktop app, or IDE extension. Works with any LLM provider — no subscription lock-in.
opencode.ai
Antigravity
Google's agentic development platform
Google's agent-first IDE where autonomous agents plan, write, and verify code across files. Free for individuals during public preview with generous Gemini usage limits.
Free subscription with Jio SIM — users aged 18–25 on a ₹349+ unlimited 5G plan get 18 months of Google AI Pro free via the MyJio app.
antigravity.google
Freebuff
The free coding agent
A free CLI coding agent plus Freebuff Web for building full-stack apps. No subscription, no API key, no credits — supported by in-CLI text ads instead.
freebuff.com
Jacq
Autonomous agent by Relace
An autonomous AI coding agent built on Relace's small models. Runs locally on macOS and Linux as well as in the cloud — resume threads and hand off work anytime.
jacquard.dev
ZCode
Z.ai's agentic coding workbench
An agentic coding harness built around GLM models that plugs into your existing tools so you can plan, code, review, and deploy without friction.
zcode.z.ai
Cline
Open-source agent for VS Code
An open-source autonomous coding agent inside your editor with Plan/Act modes and MCP integration — creates files, runs commands, and uses the browser with your approval.
cline.bot
Kilo Code
Open-source agent for IDE, CLI & Cloud
An open-source AI coding agent for VS Code, JetBrains, CLI, and Cloud with agentic workflows. Connect OpenRouter as a provider and run free models on almost no budget.
Free models on OpenRouter — add OpenRouter as a provider in Kilo Code to access hundreds of AI models, including free ones for prototyping and side projects.
kilo.ai