Can't delete my "applications" So, I somehow have 40GB worth of applications on my Macbook, but I can't, for the life of me, see what these applications are!

I looked in the Applications folder -- there are no apps except the default ones that come installed on the computer. (I made sure to delete the ones I didn't want.)

Under About This Mac > System Report > System Information, I can see all these apps installed... but I can't actually uninstall them and they don't show up in my Applications folder.

What do I do? I have no idea how to uninstall any of these apps, but 40GB is ridiculous.
The 40gb of space being used isn't actually applications there just files on your mac not applications. This has happened to me before, apparently its an indexing problem.
You Can reindex spotlight by going into terminal and typing : sudo mdutil -E /

I also would recommend downloading OmniDiskSweeper like mcmahoniel said.
Hope this helps good luck!