If you just want to update all the software on your computer, but don't want to go to each site looking for updates use this program from filehippo.com which is a 100kb download. It will check you computer first and then check the filehippo site for all the updates for the software that are installed on your computer. Which then you can easily download with one click and install.
The last thing you might want to do after formatting a computer is to go through all the software installs. So here is the simple apps that installs most of the well known open source software automatically. Go here to see what apps it can install. This way you don't have to waste time installing all the software again.