Microsoft InfoPath is an XML-based toolset of electronic forms software that integrates with SharePoint 2007 and later and Office applications. In 2014 it has been announced that InfoPath will no longer be developed by the vendor. Mainstream support is promised until 2020.
Microsoft Office InfoPath is a software application for designing, distributing, filling and submitting electronic forms containing structured data.
Questions having the tag infopath should address the use and configuration of InfoPath in a SharePoint environment: consuming data from SharePoint, publishing and using form templates in InfoPath Forms Services, configuring InfoPath Form WebPart.
InfoPath 2013 Client is slated to be supported till April 2023 as per this Microsoft blog posting - Update on InfoPath and SharePoint Forms