Nokia has released updates for App Highlights and Pulse Beta apps in Windows Phone Store. App Highlights is an exclusive app for Lumia Windows Phone devices that allows you to discover great apps in Marketplace. It also offers personalized recommendations based on your interests.
Nokia Pulse app allows you to do smarter messaging, by allowing you to send private messages that are automatically tagged with your current location, providing local places recommendations for meet ups, etc,.
There is no official change log provided for both the app updates. App Highlights can be found in Marketplace here. Download Pulse from Windows Phone Store here for Lumia WP8 devices. For other devices, check here.