alice_invoice provides a simple interface (in Ruby) to download invoices and corresponding digital signatures from the German ISP Alice.
Locate Me! is a script to geolocate your customers. It supports W3C (iPhone OS 3.0 and Mozilla Geode), Gears (Google), Loki (Skyhook Wireless), and IP-based services like IPLocationTools and MaxMind.
A simple podcast aggregator.
An online service for weather data.