Hi @Ethan Shalev ,
Before creating SQL Server Integration Services (SSIS) project, you need to separately install the SSDT standalone installer.
In addition, for the error “The application which this project type is based on was not found”, could you tell me your project type and your Visual Studio 2015 version? In general, it is caused by missing component. Please share us more details so that we can investigate it further.
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Sincerely,
Anna