AdlMIDI is a command line program that plays MIDI files using software OPL3 emulation (FM synthesis). It has a console UI. It features a built-in selection of 50 patch sets, most of which are General MIDI compatible, but some of which are customized for playing original background music soundtracks of select PC games.
Advanced Stock Tracking System (AST) is a Web-based application for keeping track of stocks. It features a portfolio with dividend tracking, a worksheet to keep track of prospects, a stock comparison utility, and a search engine for the stock market based heavily on technical analysis.
The Advanced Foundation Classes (AFC) (formerly Amiga Foundation Classes) are a suite of C/C++ classes, originally born on Amiga computers, and ported to Linux. They provide a lot of basic classes, including a list manager, a Hash Table manager, a better string handler for C programs, a string parser, and more. One unique feature is documentation - AFC comes with a PDF manual of over 280 pages.