This is still work in progress. It's already useful, but not intended for productive use. Features may work or not and are very likely to change without prior notice.
Search for WFS layers in this catalog. Contribute WFS you know by submiting URLs. Please take note of usage constraints and fees before using WFS to download geodata.
Use WFS Downloader
or your GIS to get geodata you want. URLs used in the crowd mode of WFS downloader are automatically submitted to this catalog.