MP3 Diags finds problems in MP3 files and helps the user fix many of them. It looks at both the audio part (VBR info, quality, normalization) and the tags containing track information (ID3). It has a tag editor, which can download album information (including cover art) from MusicBrainz and Discogs, as well as paste data from the clipboard. Track information can also be extracted from a file's name. Another component is the file renamer, which can rename files based on the fields in their ID3V2 tag (artist, track number, album, genre, etc.).
FlashQard helps you to learn any subject that can be learned via a question and answer format. You write a question on a card and the answer overleaf in formatted text. You can also insert as many pictures as you wish. The reviewing method is known as the Leitner system, proposed by Sebastian Leitner in 1970s. This method is a well known and widely used method to efficiently use flash cards and to reduce the amount of study time needed. FlashQard can read your card's text (text-to-speech) as you go through your cards.
Drumstick is a C++ wrapper around the ALSA library sequencer interface using Qt4 objects, idioms, and style. The ALSA sequencer provides software support for MIDI technology on Linux. Complementary multiplatform classes for SMF and WRK file processing are also included. This library is used in KMetronome, KMidimon, and KMid2 and was formerly known as "aseqmm".