.swi

Flash project developed with Swish, an easy-to-use Flash authoring tool; can be used to create basic Flash animations, interactive Flash programs, and Web-oriented Flash projects that can access database information; may also be used to convert video and PowerPoint files to Flash documents.

Swish projects can be exported in the standard Flash (.SWF) format, but may also be saved in other formats such as .AVI movies and executable Flash Projector files.