foldroid is a mail folder selection tool. For people who use mutt or a similar text mode mail reader, foldroid is a convenient tool to navigate through your mail folders. It shows how many messages are in each folder and how many of them are new. This, combined with a tool like procmail to sort mail messages of mailing lists into separate folders, makes selecting the right folder to read easy. Foldroid works best when you run it in a screen session, because it then starts every instance of mutt in its own screen.
Tntdb is a c++-class-library for database access. It implements a database-independent layer, which loads the actual driver dynamically when a connection is made. The classes use automatic resource management with reference counts. Resources are freed when the classes go out of scope. Error handling is done with exceptions (derived from std::exception). There are STL-like iterators for result sets and rows, and also the cursor is an STL-like iterator. It is written in standard C++ with Linux. Drivers for PostgreSQL, sqlite3, MySQL, and Oracle are available.