Setting up theme template category wise means that you can assign a different theme for each and every category of your website. Template Base On Category enables you to change the theme template for category and post in category base on your category ID. WIth this new plugin you can select the theme ( template ) base while creating new or editing any old category from admin section. All posts in edited categories will automatically change.
With Category Grid View Gallery plugin you can automatically generate a grid view with images grabbed from certain category posts, great for creating portfolios and photo galleries. Check out its live demo HERE.
Popular live frontend posting theme P2 lets you quickly create and publish posts from frontend but by default it only provides you a text field where you can add your post, there are no options to select and add categories from the frontend posting box. This tutorial is on a simple WordPress plugin that enable you to assign a category to your post when using P2 WordPress theme.
Featured Category Widget is specially designed for website owners for whom the Featured Post Widget is not enough. There are many different featured category widgets but this Featured Category Widget plugin is highly customizable and provides you a number of display options and features.
You can make your home page more classified by displaying your recent blog posts from each or selected category on homepage by using Shortcode.