Although ostensibly similar to FX Camera, RetroCamera offers considerably different filters, and as a result, considerably different images.
Available free from the Android Market, RetroCamera features a pinhole camera mode in black and white or colour, to provide images that hark back to the days of homemade camera kits.
The Xolaroid 2000 mode offers a Polaroid-style filter, similar to the PolAndroid filter of FX Camera, while Little Orange Box offers a high contrast, high saturation image evocative of the type of camera used in the Soviet Union in the 1970s.
Finally, The Barbl offers a very low saturation, low colour option, intended to resemble the output of German cameras from the 1950s.
You can download and install RetroCamera via the Android Market, and find out more about this and the FX Camera app in How to Snap Old-Style Photos on Android.