Page templates for Posts
This plugin provides a page templates dropdown on the post edit screen, where you can select a template of your choice to be applied to the post. The post will render in the selected template view rather than the default single view. However, if 'default' has been selected from the dropdown of page templates, then the post shows up in the single view only.
Blog Posts Order
This plugin uses the WordPress's inbuilt functionality to apply ordering feature for the posts on the blog. Just like you order your pages on a menu, you can change the order of appearance of the posts on the blog. When this plugin is activated, it overrides the default ordering by published date and the posts are ordered according to the value provided in the order field for each of the posts.
Simple CSS for Widgets
This is a very slim piece of plugin that gives you incredible flexibility to apply your own CSS class(s) to any specific widget. If this plugin is activated, it will present an additional 'CSS Class' field in every widget. You can input any css class name or even more than one class name by separating each with a space. If, somehow your widget is not wrapped inside an HTML block element (depends upon the theme you are using), this plugin will intelligently wrap the widget with a DIV tag and apply to class to it.