MuPO (Multi-Purpose-Organizer) is a powerful PIM application for desktop and PDA systems. It features a hierarchical todo-list and notes, appointments, a project-time recorder, a calendar, recurring items, and more. It is fully searchable, and it includes a tool to sync several mupo-files. You can use it on an Agenda PDA, Compaq iPaq, or on a PC running Linux or Windows. Items can be encrypted.
fotoalbum is a digital photograph/image management tool and viewer. Additional data is stored in an XML file, but can be imported/exported via EXIF/IPTC/XMP. It provides an abstraction layer between filesystem organization and album organization, advanced searching and tagging features, symbolic links, hyperlinks, and much more.