Adding and removing widgets from your sidebars is pretty easy. You wouldn’t want all your widgets to show up on every page though. Dynamic Widgets can help with that. It is a handy plugin that lets you show or hide widgets based on conditional logic rules you choose. For instance, you can show widgets to certain roles or on certain posts.
Dynamic Widgets has rules for user roles, dates, devices, single posts, WordPress pages, BuddyPress groups, and more. It is also compatible with bbPress and WP E-Commerce. Want to show widgets for an IP range? No problem.
Dynamic Widgets is a free script. You can download it here.