1 · Play with it first
Every listing has a live demo of the actual product. Click around, add things, break things — it’s your browser, go wild.
Start from working, not from scratch.
Foundationbase is a free library of real, runnable apps. Play with a live demo, download the whole project, and hand it to your AI coding agent — it arrives already knowing its way around.
21foundations21ready to use10categories
Search the libraryhabits, invoices, recipes, CRM...
Try it. Take it. Make it yours.
Everything here is a working app, not a promise of one. From “that looks nice” to “that’s mine now” in about ten minutes.
2 · Take the whole thing
One zip, the complete project, MIT licensed. Unzip, run npm install and npm run dev, and it’s running — no database, no accounts, no catch.
3 · Introduce it to your agent
Each download ships with CLAUDE.md, AGENTS.md, and Cursor rules, so Claude Code, Codex, or Cursor knows the project the moment it opens the folder. Just say what you want changed.
Featured foundations
The ones people take home most — small, honest apps with the paperwork your coding agent actually reads.
Production Ready
/productivity / updated Jun 29, 2026
Personal Operating System
Tasks, notes, routines, and planning in one owned workspace.
Next.jsReactTypeScriptLocal-first
AdvancedLevelLiveDemoMITLicense
Production Ready
/business / updated Jun 29, 2026
Client Portal
Secure client spaces for files, updates, invoices, and approvals.
Next.jsReactTypeScriptLocal-first
IntermediateLevelLiveDemoMITLicense
Production Ready
/crm / updated Jun 29, 2026
Personal CRM
A relationship operating layer for thoughtful follow-up.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Production Ready
/business / updated Jun 29, 2026
SaaS Foundation
A calm, complete base for subscription software.
Next.jsReactTypeScriptLocal-first
AdvancedLevelLiveDemoMITLicense
Production Ready
/developer-tools / updated Jul 1, 2026
Marketplace Foundation
Listings, discovery, detail pages, and trust signals.
Next.jsReactTypeScriptLocal-first
AdvancedLevelLiveDemoMITLicense
Production Ready
/ai / updated Jul 1, 2026
Agent Workbench
A workspace for prompts, tasks, artifacts, and coding-agent runs.
Next.jsReactTypeScriptLocal-first
IntermediateLevelLiveDemoApache-2.0License
Browse by category
Habits, invoices, recipes, bug reports — start with the problem you actually have.
Recently updated
Fresh commits, clearer docs, and stronger setup paths.
Production Ready
/personal / updated Jul 2, 2026
Habit Tracker
Small things, done daily, with streaks to prove it.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Production Ready
/finance / updated Jul 2, 2026
Expense Tracker
Three-second logging, and a month view that tells the truth.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Production Ready
/finance / updated Jul 2, 2026
Subscription Tracker
Find the quiet leaks in your monthly spending.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
New releases
New foundations entering the catalog.
Production Ready
/personal / updated Jul 2, 2026
Habit Tracker
Small things, done daily, with streaks to prove it.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Production Ready
/finance / updated Jul 2, 2026
Expense Tracker
Three-second logging, and a month view that tells the truth.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Production Ready
/finance / updated Jul 2, 2026
Subscription Tracker
Find the quiet leaks in your monthly spending.
Next.jsReactTypeScriptLocal-first
BeginnerLevelLiveDemoMITLicense
Built something worth sharing?
Contributor foundations ship through the same pipeline as everything here — live demo, one-zip download, agent handbook, and the same automated security bar. Your name on the listing.
Foundationbase Labs
Maintaining the catalog, the scaffold, and the security bar.
Nothing here is a mockup.
Foundationbase is not an app builder, and it is not a pile of screenshots pretending to be software. Every listing runs, every download works, and every line is yours to change.