OpenAL is a cross-platform 3D audio API designed for use with games.
There is plenty of detail in the OpenCalais Web Service documentation.
A new method to update your customers installations files.
Open Client is a programming interface allowing access to any data source.
Free, open source program for live streaming and recording.
Open Source Geospatial Foundation
MapGuide Open Source is a platform for developing web mapping applications.
Open source plugin for Google SketchUp that extends the SketchUp API.
Mobitouch CUBE is an open platform and makes available an API.
DreamFactory is an open-source REST API backend for mobile, web, and IoT apps.
API-Guide is an API-database with all the API-functions of API-list.
Design or re-rate aboveground storage tanks to API-650, API-620, & API-653.
No Magic, Inc.
MagicDraw RConverter is a tool which converts mdl files to xmi files.
Test SOAP API and REST API, and save testing reports as printable documents.
A library that maps OpenGL ES 3.1 API calls to the OpenGL API.
screen capture API,image manipulation API,easy to integrate in your product.
SAX is the Simple API for XML, originally a Java-only API.