Hello there!
This is the AutoDeriv plugin Eclipse update site. There is no fun content here.
Your options:
Go to: Windows > Preference > Install/Update > Available Software Sites,
Click the Add... button, enter the following settings
Site name example AutoDeriv-update
Update site Location http://nodj.github.io/AutoDeriv/update
Now you can fetch the plugin from the Help > Install new Software, selecting the newly created update site.
-nodj