Quality Objects (QuO) is a framework for providing quality of service (QoS) in network-centric distributed applications. These applications range from embedded applications to wide area network applications, including many military and commercial applications. QuO bridges the gap between the socket-level QoS being specified, researched, and provided by a number of organizations and the distributed object level where many distributed applications are best written. QuO adds QoS to CORBA and Java RMI in a manner which is appropriate for creating applications that can adapt to environments that are unpredictable or have strict resource constraints.
QuantComponents is a framework for financial time-series analysis and algorithmic trading, based on Java and OSGi, with an Eclipse front-end. It is highly modular: usable as a plain Java API, OSGi components, or integrated into Eclipse. It works standalone or with a client-server architecture, depending on performance and reliability needs, and is integrated with Interactive Brokers through the IB Java API. Its generic broker API means that it can easily be extended to work with other brokers. A backtesting facility and an extensible SWT charting library are provided.
QuartzCrystal is an application for rendering Quartz compositions to QuickTime movies and image sequences. It supports third party plugins (using both the official and unofficial API), as well as unsafe patches. It also supports spatial supersampling (antialiasing) and temporal supersampling (motion blur).
Quasar Media Player is a light-weight, fast, and convenient media player for mobile systems. It offers many of the features found in modern desktop media players, like fast library overview and filtering along with the ability to handle large libraries very well. It has several unique features that give it unprecedented flexibility on a mobile device, like a zoomable interface for better readability even from a distance, or auto-generated playlists from a set of locations. It offers flexible support and handling of cover art images, and features a cover art album browser and built-in downloader. Quasar is highly configurable and can be operated completely via keyboard, remote control, or touchscreen.
Quassel IRC is a modern, cross-platform, distributed IRC client, meaning that one or more clients can attach to and detach from a central core, much like the popular combination of screen and a text-based IRC client, but graphical. In addition to this unique feature, it aims to be a comfortable chatting program.
QOF (Query Object Framework), provides a set of C Language utilities for performing generic structured complex queries on a set of data held by a set of C/C++ objects. This framework is unique in that it does not require SQL or any database at all to perform the query. Thus, it allows programmers to add query support to their applications without having to hook into an SQL database.
QueryFS is a FUSE-based virtual filesystem that is based on queries. There are plugins to parse various query syntaxes and each query creates a virtual directory. Currently the most elaborate query language is SQL-based; you can either provide access to data stored in an SQL database, or keep an index of files in the SQL database and generate search directories with symlinks to found files. QueryFS and its SQL2 query DSL fully support creation of refinable searches: for example, the author has an index of downloaded email files; one can see all the distinct senders registered in the DB and then go into a directory of one sender and see all accounts that ever received an email from this sender.
Quest Identity Manager for Unix lets you remotely manage local users and groups on Unix, Linux, and Mac systems. It lets you find and manage existing local Unix users and groups throughout your environment through a single, centralized management console. You can create new local Unix users and groups throughout your environment from the same centralized management console. Local Unix user and group information can be securely managed over SSH. The management console can be run from Unix, Linux, Windows, or Mac platforms and any of the most common Web browsers. Quest Identity Manager for Unix can provide granular reports on Unix identity information, including local Unix users, local user conflicts, and all members of specific Unix groups. It can uncover rogue or unused local accounts.