Apps similar to Sidebar for Facebook include Messenger & Notifier for Facebook, which is free. Other options are Facebook Notifier and Facebook Status. In total there are three apps like Sidebar for Facebook for Mac, Windows and Linux.
Messenger & Notifier for Facebook is an easy way to check Messenger from your desktop machine. Clicking on the toolbar icon, renders messenger.com in a small UI attached to the toolbar popup.
Facebook Notifier is a browser extension that displays your Facebook notifications unread count.
See your Facebook status (New Friend Requests, Messages and Notifications) on a toolbar. Perfect for those who don't want to keep Facebook open all the time.
