I'm just investigating this myself, having taken delivery of a Motorola Defy yesterday.
Much depends on what you want it to do for your photography.
There seems to be three general categories of application.
1. Using the inbuilt camera for social reasons and uploading to Flickr/Facebook/Picasa/photobucket.
All well catered for with native applications for the service, not really LuLa territory.
2. Using the inbuilt camera for more 'serious' purposes.
Photoshop Express and a few other applications handle some basic editing tasks and Retro camera provides some interesting vintage style effects from the built in camera. There are also some apps that will automatically assemble panoramas from multiple in-camera shots.
There's even a time lapse app too.
3. For serious photographers;
Easy Release provides a method for easily gaining model releases on location.
There are various apps for DoF, angle of view etc. Previously mentioned is Photo tools which seems to me to be a bit of a hotch potch of different tasks, many of which are better handled by more specialist apps. I've found CamCalc a better slicker app that covers much of the same tasks.
There are various GPS logging apps if you want to geo-tag your work, but from what I've read it's not really such a good answer as a dedicated GPS logger with a better receiver chip. They also seem to hammer battery life too, but better than nothing.
Video/film; SL Digislate is well regarded, plus some of the above mentioned apps also handle DoF etc for video and film work too.
The one app that isn't yet ported to Android is DSLR remote which would be useful to me, but I suspect there'll be a long wait for that one although there are a lot of comments on their site asking for it.
I'll be interested to hear of any other less well known apps.
Paul
