Power Thumbnail can generate thumbnails with the existing attachment system. It offers two kinds of thumbnails – Basic Resizer & Advanced Zoomer.
This plugin enables you to save any WordPress post/page with Ajax.
Post comments quickly without leaving or refreshing the page.
add ajax-comment functionality to wordpress mu (site-wide)
AJAX Page Loader will load posts, pages, etc. without reloading entire page. This was my first plugin and is still a little quirky. There is problem
INAP uses AJAX to replace excerpts with the full posts, paginate posts, load comments and submit comments. Comes with a extremely powerful Admin Panel
Allows for updating your wordpress plugins with the click of a button.
Allows users to crop and resize an image easily using the WordPress attachment system.