| API | Description | Category | Date |
|---|---|---|---|
| Abbreviations | Abbreviated words services | Reference | 2008-08-26 |
| Aonaware Dictionary | Dictionary lookup service | Reference | 2006-11-19 |
| arXiv | Academic research repository | Reference | 2008-05-04 |
| Baby Names | International baby naming services | Other | 2008-07-20 |
| Big Huge Thesaurus | Thesaurus lookup services | Reference | 2008-08-28 |
| BigOven Recipe | Recipes, grocery list, and nutrition API | Food | 2009-10-07 |
| Billboard | Music chart service | Music | 2009-02-23 |
| Bing | Online search services | Search | 2009-06-07 |
| Business.gov | US government small business resources | Government | 2010-02-02 |
| CalorieKing | Food information service | Reference | 2009-02-19 |
| CarJam | New Zealand car facts history service | Reference | 2008-12-27 |
| CatalogWS | Academic library | Reference | 2008-02-07 |
| Chemcaster | Cheminformatics management platform | Reference | 2009-11-29 |
| Chronicling America | Archive of US newspapers | News | 2009-10-22 |
| City and State by Zip Code | Address lookup service | Reference | 2006-11-19 |
| Comprehensive Knowledge Archive Network | Community driven open knowledge database | Reference | 2008-07-10 |
| Conversions | Online calculator and measurment converter | Reference | 2010-01-14 |
| Cortera | Business information and research data | Reference | 2008-05-01 |
| Cortera Business Vitals | Basic company information web service | Reference | 2008-05-11 |
| CrunchBase | Directory of companies, people, and investors | Reference | 2008-07-16 |




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