PHP OAuth API authorizes user access using the OAuth protocol. It abstracts OAuth 1.0, 1.0a, and 2.0 in the same class. It provides built-in support for popular OAuth servers: Bitbucket, Box.net, Disqus, Dropbox, Eventful, Facebook, Fitbit, Flickr, Foursquare, github, Google, Instagram, LinkedIn, Microsoft, RightSignature, Salesforce, Scoop.it, StockTwits, SurveyMonkey, Tumblr, Twitter, XING, and Yahoo!. Every other OAuth server is supported by setting an endpoint URLs and other parameters using specific class variables. The class can also send requests to an API using the previously-obtained OAuth access token. For servers which support offline access, the class can renew expired tokens automatically using refresh tokens.
Textlocal API2 Wrapper is a PHP class that can send SMS or MMS messages using the Textlocal API over HTTP. It can send an SMS or MMS message to a given number, send a message to a group of contacts, create groups of contacts, add contacts to a group, retrieve the available groups, delete contacts from a group, delete groups, retrieve message history, etc.
jQuery.pidCrypt uses HTML5 localStorage or sessionStorage for implementing an RSA public keyring within the browser, allowing transparent asymmetric encryption of form submissions while protecting the keys with AES symmetric encryption. It is easy to implement and has numerous configurable options for pre, post, and error-handling callbacks.