During a one week sailing trip with 5 people taking photos with different camaras I volunteered to collect the images and create a sorted collection of all photos. Unluckily the most cameras were not set to the correct date and/or time. Additionally different manufacturers are following different naming schemes for the created jpeg-files.
The goal was to rename the jpeg files to some format like 'YYYY-MM-DD_hhmmss_photographer.jpeg' to get a collection of correctly sorted images. As a software developer I refused to do that manually so I wrote a library to rename and copy the files and correct the date for all images. Later I've started to write the according UI which is still in progress but already functional.