I downloaded and installed the Microsoft Connector for Oracle by Attunity from the following location for VS 2015 to use with SQL Developer 2014:
https://www.microsoft.com/en-us/download/details.aspx?id=44582
It installed correctly, but for some reason I cannot find it in VS 2015.
The following post shows where to find it in another version of VS under some SSIS tabs when adding new toolbox controls:
Attunity SSIS not available in SSIS Data Flow Tasks
But those tabs don't exist in VS 2015.
I also tried to just right-click in various areas in the SSIS toolbox to "Refresh Toolbox" and to add the Attunity "dll" I found under the install folder, but neither worked.
No SSIS tab:
Adding the "dll" file