There are over 900 contributed projects in the Backdrop CMS contrib space on Github, not all of which have official releases on BackdropCMS.org.
Please, post a comment if you have a contrib project you would like to share. Either a project you maintain or just one that you love to use and want to share with others.
Each person will have 5-10 minutes per project.
This is very informal. You can demo a module on a live site, a demo site, or just describe the module. Anything goes.