CodeIgniter for PayPal Payments Pro includes every API call available in PayPal's NVP documentation, as well as their Authentication and Permissions APIs. The controller includes "template" methods for every call which include all the possible parameters which can be passed into each particular call. All you have to do is fill the blank parameters in the array templates and pass the results into the library method. An array will be returned with all of the response fields from PayPal, as well as a few extra fields for troubleshooting purposes.
FileMaker Custom Functions for PayPal APIs provides a collection of custom functions for FileMaker Pro which provide direct access to PayPal's Web service APIs using nothing more than simple functions inside FileMaker calculations, just like any other FileMaker function. When the solution file starts, it loads a number of functions into your FileMaker system; you'll find them under External Functions from any calculation dialog. There are matching functions for each API call which PayPal provides in their NVP Web services. You simply choose a function and populate its parameters using your FileMaker data. The function will handle all communication with PayPal and return all response data back to the solution file in global fields so they're available for you to populate your own FileMaker tables/layouts accordingly.
JsonRpcPhp is a class that sends HTTP requests to a given JSON RPC server to call a specified function, passing any additional parameters. It can also send multiple JSON RPC requests and return the results of all calls. Another class can process server requests by registering a given object of service class and dispatching requests to be handled by that object.
PayPal Payments Pro/Adaptive Payments PHP Class Library includes methods to easily integrate all of PayPal's APIs, including PayPal Payments Pro and Adaptive Payments. It makes it extremely quick and easy to tie PayPal into your applications. It comes with template solution files for nearly every API call available. All you have to do is populate the request parameters, and you'll get a PHP array result which includes everything you'll need from the API call.
Yate is a next-generation telephony engine. While currently focused on Voice over Internet Protocol (VoIP) and PSTN, its power lies in its ability to be easily extended. It supports SIP, H.323, IAX, MGCP, Jingle, Jabber, E1, T1, analogic, robbed bit, ISDN PRI, BRI, and SS7. YateClient is an Instant Messenger and Voice application for Jabber/Jingle IM, SIP, H.323, and IAX VoIP protocols.
EMEXIS WEBMAIL is a Webmail application based on SquirrelMail. SquirrelMail client is a complete Webmail system, but due to the concern of making it compatible with many browsers and systems, its interface has become a little impaired. EMEXIS WEBMAIL was developed with the intention of solving this deficiency. It comes with all functionality of the original Squirelmail, but with an interface that is much more friendly for the user. It mostly uses the mechanisms for handling messages from Squirrelmail.