The BUNDLE file type is primarily associated with 'OS X' by Apple Inc.. Used for various plug-in and add-on features for OS X. BUNDLE files sometimes contain .PLUGIN files in Mac OS X.
Other applications associated with file type BUNDLE: iMovie 3 (Plug-in Bundle) by Apple Inc.
At FileInfo -- Mac OS X Application Plug-in You could also get a Linux installable for VMWare as a .bundle file. Ubuntu forum reference to work with that."
"In additional to the other, more common, more helpful answers here; Try to open the *.bundle file with a plain-text editor as some applications export several files at once and insert the content of all files into a single bundle file."