A great WordPress plugin which helps you to choose a unique image for each menu page.
Custom Image Sizes by 99 Robots is a quick and simple way for you to add your own image sizes to your WordPress site.
Add options in media setting page for images sizes
Custom blogger images adds extra image sizes & golden ratio proportions to your WordPress themes.
Light and simple Skype Button plugin (w/ Official or your Skype Status Icons) in post/page/widget or floating. Skype Status updates without refresh.