Personal Organization Open APIs
| Provider | Description | Commercial Use | Limits | Terms | Fees |
| 43 Things | Set Goals and share with other people | No | Yes | ||
| Airset | Great group calendar, lists, blog, contacts | Web is free Optional mobile app $5/mo. |
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| Backpack | To dos, notes and reminders | Yes | |||
| CalendarHub | Personal, group, and public calendars | ||||
| Google Calendar | |||||
| Holiday Service | This free web service allows you to query for the dates of holidays to embed into your applications. The Holiday Service allows you to search for holidays for the United States, the United Kingdom (England and Wales, Ireland, and Scotland). You have the option of querying for a specific date range, or asking for the dates for an individual holiday. | Yes | Free to use web service; compiled DLL and web service source code are available for purchase | ||
| Planzo | Online Calendaring System | ||||
| Simpy | To dos, notes and reminders | Yes | |||
| voo2do | Personal task management | ||||
| Zimbra | Email, calendering and contacts |
Examples of sites using APIs
| Example | Description | APIs Used |
| Back Pack It! | Script that allows adding of web page content as notes to your Backpack | Backpack |
| Our Family Heart | Family web site | Holiday Service |
| xfy RDF Calendar | xfy RDF Calendar is a schedule tool which uses RDF Calendar format. It also converts RDF Calendar format to iCalendar and hCalendar format. RDF Calendar XVCD gets the event information from the Web Services such as Google Calendar, eventful and Upcoming.org. | Google Calendar |
Definitions:
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Provider - Who is providing the API?
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Description - What does the API let you do?
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Commercial Use - Can you use this API for commercial use without asking?
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Limits - Are there any limitations to amount of usage?
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Terms - Link to Terms of Service