The FileHippo Update Checker will scan your PC for outdated software and offer to download the latest version.
Keeping PC software up to date is a real pain and running old versions can be a very real security risk. This is where FileHippo Update Checker comes in. It scans your computer for installed software and checks the version against the latest version on its web site. If it finds a newer release, it will offer these to you for download.
Only programs available on the FileHippo.com site are supported, so you will still have to check the rest yourself, but between Update Checker and Secunia PSI, most programs are covered.