Drawings and other diagrams created in Microsoft Visio (.vsd, .vdx, .vsdx etc.) can be used in creating new PowerPoint presentations (.ppt - older PowerPoint versions prior Microsoft Office 2007, .pptx - PowerPoint presentations from Office 2007, 2010, 2013, 2016 and newer) or import to already existing ones.
This can be done via import function found in PowerPoint or other presentation programs that support that support PowerPoint formats, however a direct vsdx to ppt conversion is otherwise unlikely.Open VSDX file Open PPT file
Free presentation program from OpenOffice.org
A diagramming program for Apple Mac and Windows
Powerful multimedia presentation software tool from LibreOffice suite
A presentation program from the Microsoft Office suite
Mac version of popular presentation software from Microsoft