.DAT file extension
This is the list of programs to work with .DAT extension
RealPlayer is one of the most popular video player.
LP2005 Data File
Plot geotechnical, environmental, and geophysical data as a graphic boring log.
It allows you to manipulate data in all major formats.
Keep track of your stocks, mutual funds, bonds, cash, and other investments.
It is an open source game archive (Quake PAK) unpacking program.