To keep track of all new versions of software is quite hard as more and more applications are installed on your pc. However, using FileHippo, this can be made very easy. Just install the program and by using this, it checks if any program on your pc is outdated and should be updated. If an update should happen, it directly leads you to the downloadpage of the new version.
Now, I have the new version of Skype, Java and CCleaner. Great.
(Works best on OSes which do not have a package manager)