BaseX is a light-weight, high-performance, and scalable XML database system and XPath/XQuery processor, including full support for the W3C Update and Full Text extensions. An interactive and user-friendly GUI frontend gives you great insight into large XML data instances. It is platform independent and works out of the box.
Basenji is an indexing and search tool designed for easy and fast indexing of media collections. Once indexed, removable media such as CDs and USB sticks can be browsed and searched for specific files very quickly, without actually being connected to the computer. Besides file hierarchies and audio track listings, Basenji also presents extracted metadata (image dimensions, mp3 tags etc.) and content previews of indexed media in a clean and straightforward user interface.
BasicQuery is a Java-based application used to access databases through JDBC. It features a Swing-based GUI and includes capabilities useful to developers when testing SQL statements against a database. It also produces timing information, which is valuable during tuning exercises.
Bist stands for "bidimensional structures" and is a chemical drawing tool. It is focused on organic chemistry, but it may be useful for chemists or teachers as well. Bist support many of the formalisms used to describe molecular structures like single bond, double bond, stereospecific bond, charges, resonance arrows, lone pairs, and so on. It can export both PostScript and PNG formats.
Bitcoin is a peer-to-peer electronic cash system that is completely decentralized, without the need for a central server or trusted parties. Users hold the crypto keys to their own money and transact directly with each other, with the help of a P2P network to check for double-spending.
BleachBit deletes junk to recover disk space and maintain privacy. It rids your system of old junk including cache, Internet history, temporary files, unused locale files (better than localepurge), logs, and cookies. Designed for Linux systems, it wipes clean 50 applications including Adobe Reader, Bash, Firefox, Flash, OpenOffice.org, Opera, Real Player, Skype, and more. It shreds files so that they cannot be recovered, and it wipes free disk space to hide insecurely deleted files. It offers both a simple PyGTK GUI and a command line interface for automation.
BlogMatrix Jäger is a "one-panel" RSS and Weblog reader and podcast receiver for Windows, Mac OS 10.3, and Linux. It takes only a tiny amount of your screen's real estate, as it uses your browser as its display. You can skim tens of blogs at the same time using the offline browsing features.