Did you install Ubuntu only to find that something didn't work, or were you looking for drivers in preparation before installing?
Most Linux distributions have drivers built-in, so your devices should work out of the box without having to even think about drivers. This was one of my rookie mistakes when I tried out Linux a few years ago, wondering where to find Linux equivalents of my Windows drivers. I've been a happy Linux user since 2009 and haven't had to worry about drivers.
One exception are graphics card drivers, but Nvidia and AMD both have Linux drivers and it's only a concern if you play games; general desktop use should be fine with the pre-installed drivers. Another are wireless drivers which depends on the chip manufacturer but support is pretty good for most wi-fi adapters.