It started with a very plain idea: gather the WordPress plugins and themes people actually use, and make them easier to find, download, and keep updated. We had been through that stage ourselves — a limited budget, a site to finish, and hours spent hunting for resources and tutorials.
So we started building this library — sorting plugins, verifying sources, tracking releases, then improving the download experience and adding categories, a brand index, and an update mechanism — until it grew into the WordPress resource platform it is today.
Every package should state as clearly as possible where it comes from, who the original developer is, and what the official site is. You have the right to know what you are downloading — and the right to decide whether to get it from GPLlib or support the original developer directly.