.SPARC File Extension
What is an SPARC file?
File used by Extras Manager, a plug-in manager component for Skype Internet voice and video calling software; contains the plugin to be installed with Skype; downloaded from the Skype Extras website and can be installed by double-clicking the file.
For some Skype versions, the Extras Manager is an optional component that can be included with the Skype installation. If you download a SPARC file but can't install it, you may have not included Extras Manager in the installation. To fix this, reinstall Skype and select the Extras Manager option.
NOTE: Extras can be managed in Skype by selecting Tools → Extras → Organize Your Extras.