iTramp is a small personal accounting application. It presently supports multiple accounts, transaction types (cheque, CB, etc.), categories and sub-categories, transfer between accounts, a scheduler to save periodic transactions, basic search and statistics functions, and QIF import.
Earth3D visualizes the earth in realtime in a 3D view. One can rotate and zoom the view and fly around. Additional data layers can be added to the view, e.g. country flags and names. It uses data from NASA, USGS, the CIA, and the city of Osnabrück. The data is loaded on demand over the Internet.
qmptombox converts QuickMail Pro files to mbox files, ready for use by Mail.app or whatever your preferred mbox reading mail client is. It's a command line tool that churns out mboxes; just point it at your CE Software folder (usually in the OS9 system folder), and it will generate mboxes corresponding to the mailboxes in QMP. The default output is in Mail.app format.
LOAF (List Of All Friends) is an extension to email that lets you send out address book data without compromising your privacy. It appends a hash-like data structure to each outgoing email, and collects similar attachments from the people who write to you. These files can be queried to see if they contain a given email address, but they can't be reverse-engineered to reveal the list of addresses used to construct them. LOAF lets you check whether someone emailing you for the first time is a complete stranger, or appears in the address books of some of your trusted correspondents. And as a decentralized application, it offers an interesting alternative to current social networking sites like Orkut or Friendster.
db.* is a database management system (DBMS) designed to provide powerful, flexible, high-performance capabilities for developing embedded database applications. By combining the network and relational model technologies in a single system, it lets you organize and access information efficiently, regardless of the complexity of the data. The database has a very small footprint and because it is possible to use the network model to store some of the data, it can be very fast. It is also well-documented and quite simple to learn because of its C-based API.
Spinneret is a structured storage engine that can be thought of as an extended tuple storage system. It takes the best aspects of relational, object, and hierarchical databases and throws away the dead weight associated with those technologies. The benefit of Spinneret is that its data model is incredibly flexible, allowing it to expose its underlying data in any number of ways. It operates similar to an object database, but without hard ties to an originating language, and can also behave like a relational database without the burden of complex joins.