Windows 7 Tip: 
If you are looking out for some cool Social Bookmarking icons than you have check out this post, here i am posting some of the coolest Social Bookmarking icons for the bloggers. To increase your social media traffic that your blog receives, you also need to consider enhancing a few icons to your favorite social media bookmarking sites. This will provide good amount of boost towards your daily site visitors.
1. Heart: My Free Social Icon Set
2. 6 Free Social Icons
Download Link: Photoshop PSD file , Vector Illustrator file , PNG file , Image JPG , Icons Format
3. Handycons Icon Set
4. Socialize Icons
5. Social Bookmark Iconset
6. Social Bookmark Iconset: Part II
7. Social Web Buttons
8. Web2.0 logo
9. The Leaves
10. Vector Social Bookmark Icons
11. Cheers Icon Set
I like when to stumble post that has good collection of icons. good job bro!
Very nice collection.
Thanks for the icons.