April 6, 2017
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Our API directory now includes 54 calendar APIs. The newest is the InfoPark Web Calendar API. The most popular, in terms of mashups, is the Eventful API. We list 47 Eventful mashups. Below you'll find some more stats from the directory, including the entire list of calendar APIs.
Instant messaging and chat services are very popular on ProgrammableWeb. With that in mind, we've listed the most popular chat APIs on ProgrammableWeb based on traffic and other factors. The APIs list includes 57 of the most popular chat APIs plus we have also have listed 28 Skype mashups.