The Davis Weatherlink package contains the datalogger hardware that connects the console to a computer, and also at no extra cost the Weatherlink software. The Weatherlink software is very useful for the station settings. But you will likely find you would like to use alternate software, like Cumulus, for data saving, uploads and your own website, etc..
There are third party data loggers available at lower cost and without the WL software. Search the forum for belfryboy.
Enjoy,
Paul