I didn't actually know that such a thing as a keylogger existed until just recently and I've been wondering what they could actually be used for. Sure, I know what spyware would do with it, but what would be a legitimate use for a legitimate keylogger?
It took me a bit of time because I'm not all that au fait with the ins and outs of technology but there seem to be at least three very good uses.
1) This one would be useful for me. Recording the various passwords and log ins to everything. Yes, I know you can use windows and or your browser to do most of these but do you really want to trust your security to such?
2) There's a corporate use as well. Not just the above log ins thogh, it'll help managers keep an eye on what users are actually doing on their computers. For example, managment can be held responsible if someone starts sending around dirty pictures and the like and very expensive that can be too. So if they're able to check on who is purveying such images then they can nip it in the bud.
3) A similar use could apply to a child's computer at home. Making sure that they're not straying off the straight and narrow into unapproved pastures.