It’s not too often when you come across free sets of icons that have that professional look too them. DryIcons has at least 5 Free available icon packs that simply look gorgeous. One of my favorite packs by DryIcons, is the Ruby Multimedia set.
This set features 13 high quality icons depicting media equipment such as a web cam, headphones, mouse, digital camera, ect.
Then, there is the WYSIWYG Sapphire icon set. These icons would be perfect for anyone developing their own WYSIWYG text editor. 47 icons are featured in this set.
Next up is the WYSIWYG Classic set. This set is the same as the one above, except it doesn’t have that blue Sapphire touch.
Blue Velvet is a high quality icon set that you would use on your own website. This set contains 86 icons and features buttons that can be used as a means of communicating a specific purpose.
Aesthetica is the big one. This set features 160 icons and contains everything from media player buttons, to all sorts of operating system icons.
Thoughts and Insanity From Jeff 
a big thanks for this – as an icon junkie (due to being a developer I think) I have download and bookmarked this as many ways as I can so I don’t lose it :)
@Steven Hodson Hey Steve, glad I could help lol. It seems like people enjoy my icon pack posts so I have set up my FeedDemon to watch any and all RSS feeds for Icon Set releases and I post about them here.
I can’t tell you how many people have googled the search term Web 2.0 icons and have found my post.