| API | Description | Category | |
|---|---|---|---|
| Tinylink | URL shortening service | Internet | 2007-10-25 |
| unAPI | Proposal for web clipboard | Internet | 2006-03-28 |
| Urloid | Short URL service | Utility | 2007-12-06 |
| Virtuoso Sponger Proxy | RDF proxy service | Internet | 2008-08-14 |
| W3Counter | Web site metrics tools | Internet | 2006-06-01 |
| Webride | Attaches discussions to any site | Internet | 2006-06-06 |
| WebSitePulse | Web site and application monitoring service | Internet | 2007-12-25 |
| WebThumb | Thumbnail image generation service | Internet | 2006-11-01 |
| Weebly | Web site and blog creation service | Internet | 2008-05-22 |
| Who Is Hosting This | Find out who hosts a web site | Internet | 2008-08-26 |
| Windows Live Admin Center | Web site administration services | Internet | 2007-01-29 |
| World Time Engine | World clock and time zone service | Utility | 2008-02-27 |
| Wufoo | Online forms creation service | Other | 2007-03-17 |
| Yahoo Site Explorer | Web site analysis service | Internet | 2007-02-01 |
| YouOS | Web based operating system | Internet | 2008-05-14 |