Gif Camera, an app to make animated gifs from your photos, is once again FREE for a limited time

Gif Camera - zhang yan

Photo Splash FX, a good selective coloring app, is FREE once again

Photo Splash FX - Master.Minds

TonalTopia, an app to apply tonal depths to your photos using color filters, is now FREE

TonalTopia 

Night Fast Snap! - an app to help capture photos in low light, is FREE for a very limited time!

Night Fast Snap! 

Picwall Plus and Frametastic - two collage making apps, are now FREE for a limited time

Picwall Plus
Frametastic

PolyMagic - a very different type of collage making app, is now FREE

I think this app looks very promising in the deluge of other collage making apps.

Color Range – App For Creative Color Play is now FREE

Although it has some negative reviews on apple store, I have personally used it and found to be very good at what it claims in the app description.

Kabaam, a good app to make comics from your photos, is now FREE

It's discounted down from its usual price of £1.49.

Fotolr camera and video pro is available for FREE for just 3 days

By the makers of some other popular apps like Fotolr Camera Studio and Fotolr Camera FX+, Tiny Piece Co. Ltd., have discounted the price on Footolr Camera and Video Pro for a very limited time.

MobileMonet, a sketch painted filtering app, is now available for FREE

I like this app. It is like ToonPaint but with Different effects. Certainly worth downloading at its current FREE price.

Gif Camera is FREE for a limited time

It's is a nice little app for making animated GIFs on your iPhone.

Photo Stats, an iPhoneography app that shows vital statistics on your photographing habits, is once again available for FREE

Download the app using the below link.

wasHere seems an interesting app and is available for FREE

I haven't yet myself tested the app, but going by its app store description, it sounds quite interesting to me. It takes two pictures simultaneously with the front and rear camera together and then sews them in a way that puts a faded version of the front facing camera image on top of the rear facing one.

Luminance, an iPhoneography app, is now available for FREE

Luminance is a top ranking iPhoneography app and is available for FREE for a limited time.

Photographers Rights is now available for FREE

This app tells you about the rules and regulations that you need to follow while photographing in specific countries.

Lumiere, a vintage style iPhoneography app, is now FREE for a limited time

It's one of my favourites when it comes to taking/converting photos in/to vintage style.

Van Monet, an iPhoneography app, is now FREE

Camatrix is now available for FREE

It converts your photo into matrix style green tints with strong edges.

PerfectPhoto is now available for FREE

Large Aperture Pro available for FREE

It is an OKish app for adding SLR like Depth of Field to your photos. It is not as great as Big Lens, which is the best in this category, but still quite alright. Maybe future enhancements will make it more competitive.