Adam Nowak

Create multiple sidebars, just name your new sidebar the same name as the Buddypress Component and it will show up when that component is displayed. So you can have separate sidebars for ‘Activity’, ‘Members’, ‘Groups’, etc. You can also name a sidebar the same name as any page and that sidebar will automatically show up on that page. Prefabricated sidebars include Home and Blog. The Blog sidebar will appear on single and archive blog pages.

Buddypress Sidebar

This plugin enables you to have multiple sidebars for Buddypress. Create new sidebars that are unique to each page.

Kishor

A WordPress Plugin that makes it very simple and easy to create a custom widget areas, sidebars and Menu locations. With the help of this plugin you can create multiple custom widget areas, menu locations and use it wherever you want to show in your site.
It allows you to show custom widget areas and menu locations created with this plugin in any part of your site (i.e, as sidebars, bottom widget areas , in header and plus with this plugin now you can also show it in your pages and posts contents.) There’s two way of using this plugins. To show it in posts or pages content use shortcode link “Get shortcode” and for other like to show as sidebars etc. use code link “Get code”.

WP Custom Widget area

A very simple way to create a custom widget area, sidebars and menu locations for your wordpress site.

Buddypress Sidebar vs WP Custom Widget area