Twitter-icon.com has a great selection of twitter icons and buttons.
Site: eu-egee.org (EGEE Portal: Enabling Grids for E-sciencE)
EGEE: Enabling Grids for E-sciencE is the largest grid infrastructure in the world, which brings together more than 140 institutions to produce a reliable and scalable computing resource
Do you have a twitter account? If so it's important
to get as many people as possible to follow you.
Great follow me icon captures attention of the visitors
and brings more followers to your twitter account.
Choose great twitter icon for you website!