If you are interested in J2ME QRCode Encode and Decode, here comes a wonderful J2MEQRCode application. It supports MIDP 2.0 with CLDC 1.0, yes CLDC 1.0. This is the only application that support CLDC 1.0 mobile phone as I know. It runs on my Motorolla V1
Trekbuddy (v0.955) is a wonderfull tool for Geotagging. Geotagging means to whrite coordinates to pictures. Most people know this from flicr. A better way is to write the coord to the exif data of the pictures.