Live · 553 entries
The Goudbeek
Library.
A hand-checked catalogue for people who build with AI — tools with a take, stacks, recipes, comparisons, prompts and more. Every entry earns its place.
Today at the library
Rotates dailyResend
A developer-first email API from the React Email team, with a lovely DX. The default transactional email for indie and AI-built apps; React Email makes templates painless.
Read the deep dive →Prompt of the dayRoot cause before you touch a line
There's a bug I need fixed, but do NOT change any code until we agree on the root cause.
Symptom: [WHAT GOES WRONG]
How to reproduce: [EXACT STEPS / INPUT / URL]
Expected: [WHAT SHOULD HAPPEN]
Actual: [WHAT HAPPENS INST…Cold start
The delay when a serverless function has to boot up from scratch before handling a request.
Because serverless functions shut down when idle, the first request after a quiet stretch has to wait while the platform spins up a fresh environment and loads your code — that's the cold start, often a few hundred milliseconds up to a couple of seconds. Requests that follow hit the now-'warm' instance and are fast. Analogy: turning the key on a cold engine versus one that's already idling. It bites hardest on low-traffic apps and heavy runtimes; lighter or edge runtimes shrink it, and some platforms let you pay to keep functions permanently warm.
Learn it →What is this place?
A library, not a bookshelf
- 01
Curation over completeness
No infinite scraped index. Every entry is hand-checked and earns its place — if a tool isn't worth your time, it isn't here.
- 02
A take on everything
Not marketing blurbs. Each tool carries a short, opinionated verdict on when to reach for it — and when not to.
- 03
Connected, not piled
Tools link into stacks, recipes, comparisons and prompts. You don't browse a list — you follow a thread.
The shelf, by category
What it costs to try
94% of the shelf has a real free tier — you can try almost everything here without a card.