Zoomable viewer for very large images. Allows you to specify an image URL which is then converted into a Zoom.it URL which "hosts" your big image. really nice - though requires silverlight plugin

SimpleGeo Context provides relevant contextual information such as geographic boundaries, weather, and demographics for a specific location.

LA Metro's API including web services, GIS information and metro's latest route, stop, and schedule information in the GTFS format.

Free geocoder provided by google. may only be used in conjunction with displaying results on a Google map; geocoding results without displaying them on a map is prohibited. Limited to no more than 15,000 geocodes requests in a 24 hour period from a single IP address

Free geocoder provided by yahoo. limited to 5,000 queries per IP address per day

Geocoding web service free for non-commercial use. Lookups are throttled by your IP address to one request every 15 seconds.

Allows for the dynamic generation of charts through data encoded into the query string

Currently there are a few types of interfaces available to the LiveJournal protocol: the older "flat" interface, the custom XML-RPC interface, and a modified version of the Blogger API.