Twitter applications & icons

I have seen a lot of list and overviews lately about twitter. Here is a small summary.

An interesting list from csstea. In this list you will find 67 useful twitter applications, tools, backgrounds and resources.

Loads userâ€™s avatar by matching the email address to the userâ€™s Twitter email address.
If user doesnâ€™t have a Twitter account, it first tries to load userâ€™s gravatar. If user doesnâ€™t have a gravatar, it loads a default image. This is an optional setting.
You can set a 2-pixel border to the images (you choose the color).
You can choose the size: we suggest 24, 48 or 72 pixels.
You can set an image other than the default one to load if a user doesnâ€™t have a Twitter account or a gravatar.
It builds a valid image for you (with alt and title attributes, etc.) based on user details.
Allows you to add a class to the image, so you can style it later.