For .ex files go to: http://www.fileextensionex.com.
For .ithmb files go to: http://www.fileextensionithmb.com.
For .dat files go to: http://www.ifileextensiondat.com.
For .m4p files go to: http://www.fileextensionm4p.com.
For .mailhost files go to: http://www.fileextensionmailhost.com.
For .kml files go to: http://www.fileextensionkml.net.
For .qfx files go to: http://www.fileextensionqfx.com.
For .part files go to: http://www.fileextensionpart.net.
For .lwp files go to: http://www.fileextensionlwp.com.
For .srt files go to: http://www.fileextensionsrt.net.