The educator and developer community at iear.org has taken nominations and votes for their 2010 Best App Awards. While nominations and voting is now closed, the list of dozens of nominees is a valuable resource. Nominations were made in early December by those who read I Educational Apps Review's blog. There are nearly 20 categories and each category is divided into elementary and secondary.
You can view the 125 apps categorized in a spreadsheet or view their icons in a widget. Clicking an icon will take you to the app's details page in the App Store. The widget was made using Appsfire's Widget Maker.