Extensive geo data for place names and significant locations around the world. Data files provided by Yahoo with a Creative Commons license

RoamBi

http://www.roambi.com/

RoamBi

Data visualization system for viewing business intelligence on an iPhone. Packages up your information as a fully-interactive iPhone app and delivers it to your device. Pretty slick.

ProjectManager

http://wordpress.org/extend/plugins/projectmanager/

ProjectManager

“This (WordPress) plugin is a datamanager for any recurrent datasets. It can be used to manage and list a DVD collection, to to present portraits (e.g. athlets of a team), simple tabular calendar or anything you can think of.”

CrunchBase API

http://groups.google.com/group/crunchbase-api

CrunchBase API

Get access to the really valuable data in startups, people etc in the tech/web/web 2.0 space via API.

Contacts Data API

http://code.google.com/apis/contacts/

Contacts Data API

“allows client applications to view and update Contacts content in the form of Google Data API feeds. You can request a list of a user’s contacts, edit or delete content in an existing contact, and query the content in an existing contact.”