Instagram is a popular photo sharing app for iOS, but unfortunately they do not yet have a Windows Phone client. InstaCam is an unofficial Instagram client for Windows Phone. It allows you to take pictures on your phone, apply effects to make the picture beautiful, and then share them via Facebook, Twitter, or email.

It's a new app that has a good feature set, and more features are coming.

Features:

Browse anonymously without an Instagram account or login to use more Instagram features

View popular pictures from users around the world

View pictures from your friends or view your own Instagram pictures

Share pictures with your friends on Facebook, Twitter, or email

Follow and un-follow users and see your own followers(followings)(view limit 50)

Add likes and post comments to pictures

See who liked picture(view limit 50) or added comments

Search for photos by tag

User profiles with feeds, likes, followers and more

Make your own photos and use one of 7 filters

Two special filters are exceptionally new and you will not find them anywhere else