ConvertAll is a unit conversion program in which units can be combined with multiplication and division operators and can be squared, cubed, etc. The interface is graphical, allowing the units to be selected from lists and the conversions to be made in both directions. Non-linear units (such as temperatures and gauge sizes) are supported. The unit data file can be easily modified to add additional units. ConvertAll is based on the PyQt library.
TreeLine is used to organize and store text data in a tree structure. It is well suited to keeping track of many different types of information. Each node of the tree can contain several defined fields, forming a mini-database. The format of each node can be defined, and the output can be shown on the screen, printed, or exported to HTML. The tree structure is navigated and edited in the left pane of the window, while various views of the child data are shown and editable in the right pane. The data is stored in XML text files. TreeLine is based on the PyQt library.
Krename is a very powerful batch file renamer for KDE which can rename a list of files based on a set of expressions. It can copy/move the files to another directory or simply rename the input files. Krename supports many conversion operations, including conversion of a filename to lowercase or to uppercase, conversion of the first letter of every word to uppercase, adding numbers to filenames, finding and replacing parts of the filename, and many more. It can also change access and modification dates, permissions, and file ownership.
The libcomprex library transparently handles automatic compression and decompression of files and archives located locally, online, or even in other compressed archives. The API is similar to C's built-in file access functions, which provides a smooth transition to libcomprex. libcomprex can also open uncompressed files, making it a good replacement for the native file access functions.