The SEA file format belongs to StuffIt Expander, a compression/archive utility on the Apple Macintosh. These files are self-extracting executables, so simply double clicking on the files should start extracting the files within.
Elb 2009-02-02 08:08:58 #1 If you're having trouble opening your .sea files try changing the extension from .sea to .app or .exe - worked for me!!