Kpl is a KDE program for two- and three-dimensional graphical presentation of data sets and functions (plotter). Multidimensional nonlinear parameter fits of functions to data sets can be performed using the Levenberg-Marquardt algorithm. General linear least square parameter fits are also possible. A D-BUS interface can be used to control Kpl by other applications and scripts.
The qmeterslib library provides a highly customizable Qt widget for creating complex analog dial widgets. It supports multiple scales, multiple needles, and customizable needles and backgrounds. It works as a "container" QAnalogMeter widget that is initially empty. The developer must create one or more instances of a scale (clock or sector) and one or more instances of index/needle (clock, donut, pie). A demo application is included.
Barcodes for Python is a library that can create EAN-13, Code-128A, Code128-B, Code128-C, and Gs1 barcodes. It also includes a CLI tool that can generate barcode image files and GTK+ and Qt GUI examples with printing support. The barcodes is produces have been verified using a cheap Deltaco (KB Wedge B519153) CCD handheld barcode scanner.
Kittens is an application container that can embed X applications and steal them from your window manager in order to provide advanced window management options to any window manager. It can tab windows together, split to show them vertically side by side, and allow applications and splits to be resized with the mouse or keyboard. It works in environments such as GNOME, KDE, and XFCE. Kittens is also ideal for managing applications without having to use a mouse.
Source-highlight-qt is a library for performing syntax highlighting in Qt documents by relying on the GNU Source-Highlight library. It provides an implementation of the Qt abstract class QSyntaxHighlighter class, and it deals both with Qt3 and Qt4, although you will need to build a separate version of the library for the two different Qt framework versions. The Qt3 version has fewer features and it is there only for old Qt applications. Furthermore, the QSyntaxHighlighter class in Qt3 has some design problems which make it quite inefficient to use.
Trojita is a Qt IMAP email client. It is a pure Qt4 application with no additional dependencies. It has a robust IMAP core implemented using Qt's Model-View framework. Standards compliance is a design goal. It has support for bandwidth-saving mode aimed at mobile users with expensive connections. In addition to the usual SSL/TLS connections, the server can be accessed via SSH. It has on-demand body part loading, offline IMAP support, and safe dealing with HTML mail (actually more robust than Thunderbird's).
Eliot is a Scrabble game. It offers four different game modes (standard game, duplicate mode, training mode, and arbitration mode), to play alone, against the computer, or with other players. Several variants are also available (joker, explosive, 7 among 8). Eliot supports different dictionaries, and provides fast and powerful search tools (including search by regular expressions).
Opticks is similar to commercial tools like ERDAS IMAGINE, RemoteView, ENVI, or SOCET GXP. Unlike other competing tools, you can add capability to Opticks by creating extensions. It supports the following file formats: NITF 2.0/2.1, GeoTIFF, ENVI, ASPAM/PAR, CGM, DTED, Generic RAW, ESRI Shapefile, HDF5, AVI, MPEG, JPEG, GIF, PNG, and BMP. It can zoom, pan, or rotate spatially large datasets. It can quickly layer GIS features, annotations, results, and other information over your data to provide context. It has many image display controls such as colormap, histogram, transparency, etc. Support for datasets larger than four gigabytes. Analysts can quickly combine steps using graphical wizards. Support for processing data in its native interleave of BIP, BSQ, or BIL. Extensions can add new processing algorithms, file formats, visualizations of the data, or data types.