Themes allow you to change the look and feel of your Drupal site. You can use themes contributed by others or create your own to share with the community. Contributed themes are not part of any official release and may not have optimized code/functionality for your purposes.
You can also create a sub-theme of an existing theme. A sub-theme inherits a parent theme's resources. Read more about Sub-theme structure and inheritance.
You can also view a full index of themes listing only their titles.
This is an elegant theme that focuses on quality typography and that can be styled to suit many applications. It offers a framework for development of many motifs, whether corporate, professional or organizational and beyond. That is all up to your imagination and what kind of imagery you fit into the theme's many configurable regions.
Open Instructor is a theme designed for use with the custom Drupal setup of Open Professional Writing (open-pw.com), a CMS for the Writing Classroom. It is built off of AdaptiveTheme and required the 7.x-2.x branch. The theme comes with a generic setup for sidebar blocks and OPW-specific block images and settings.
Open Student is a companion theme for the custom Drupal 7.xx install Open Professional Writing (open-pw.com). It comes with OPW specific images and block code to allow for the full OPW UI experience. Open Student is based on AdaptiveTheme and requires the 7.x-2.x branch.