Well, yes and no. Most of the popular tuner cards come with something similar to Tivo. ATI ships with PowerCinema, Hauppage with WinPVR, etc.
PowerCinema blows, but I've heard decent things about WinPVR.
Or you can buy the card of your choice, and use a 3rd party PVR application, either free or retail. GBPVR is pretty good if you are tech savvy and can stomach messing with it to make it work. MythTV gets excellent reviews from Linux types.
Personally I use Snapstream's BeyondTV 4, and wouldn't switch to anything else. It will cost you $60-70, but it is rock solid, comes with an online program guide, and works extremely well.