The Autodesk® FBX® SDK is a free, easy-to-use, C++ software development platform and API toolkit that allows application and content vendors to transfer existing content into the FBX format with minimal effort.
FBX Extensions Software Development Kit
* Files for Mac should download properly as .tgz files on a Mac operating system. However, Windows may automatically rename the files to .gz if downloaded on a Windows machine. Please take note that the FBX SDK for GCC requires Mac OS X 10.6 and the FBX SDK for Clang requires Mac OS X 10.8.
** Please note that the FBX SDK for iOS requires iOS 6.1 or higher.
*** Files for Linux should download properly, without any extension, on a Linux-based system. However, Windows may automatically add .txt to the files, as there is no extension, and Windows associates these as text files. On Windows, you may also need to right-click the link, and select “Save Target As…”, depending upon your Windows web browser.