On November 13, 2012 a new version of Android called Jelly Bean was introduced by Google. Nexus 4 and Nexus 10 (Tablet) were the first gadgets to receive this update. Other popular gadgets like Samsung Galaxy S3, Galaxy Note, HTC One X, and Sony Xperia Z have also this update available or at least going to receive this update soon. Google also claimed Nexus S and Motorola Xoom won’t receive this update.
Here are some Android Jelly Bean Features:

Screen Lock Widgets: Now you can use widgets like Gmail or Calendar right in your screen lock page and you have the ability to activate camera automatically after unlocking. Now you are not required to unlock the device in order to see notifications and emails.

Edit Photo improved: Unlike prior versions, you won’t lose the original photo now if you edit one in Edit Photo app.

Jelly Bean Dreams: Jelly Bean includes a new feature called Daydream. Daydream is nothing more than a different name for a screensaver, but for your Android device.

360 degree photographing: You can take 360 degree photos now and share them on Google Maps immediately. (Read more about this feature: What is Photo Sphere in Jelly Bean?)

A smarter keyboard with Gesture Typing: Now you can easily glide your finger over the letter you want to type without the need to press each key individually. You are also able to use speech-to-text capabilities to do voice typing, which now work even without a data connection

Quick Settings: There is a Quick Settings icon available on the top right corner of the notification page to quickly apply custom settings.

Camera just got be tter: Camera application has greatly improved and it is not necessary now to seek for a settings icon. Tap and hold to access settings or single tap to take a photo.

One Tablet, many users: It is now possible to have multi-users on your tablet so that you can give each user their own space. And since Android is built with multitasking at its core, it’s a snap to switch between users – no need to log in and out. A feature which is currently not possible on IPad.

Wireless photo sharing: Share your photos, movies and video clips now with your big screen TVs and displayers. Just connect a wireless adaptor to your HDMI-Enabled TV, to mirror what’s on your screen quickly and easily.

See, if your device is getting Jelly Bean or not: Which Smartphone and Tablets get Jelly Bean Update?

Don't miss our handpicked widget packs for android jelly Bean on the Android Widget Packs page.
Here are some of them:

10 Best Android clock Widgets for jelly Bean

5 Best Android Lock Screen Widgets

5 Best Android Calendar Widgets

5 Best Android Quick Contact Widgets

10 Must Have Android Widgets for New Users