Open-Source Replacement For Closed-Source Software

It's not often case that I'm forwarded something interested to read at work in a technical email but this time was a definite exception. The following URL cropped up in a conversation around Drupal;

http://www.opensource-it.com/open_source_alternatives_proprietary_enterprise_software

What it basically is is a website which allows you to search for a piece of closed-source Software, for example Microsoft Project and see that the Open-source equivalents are Open Workbench and OpenProj.

Slightly off-topic I know but I just found this website so incredibly useful I just thought I'd pass it on!

OpenSource-IT.com Website