Kiwix is an offline reader for Web content. It was designed for use with Wikipedia, but is potentially suitable for all HTML content. It supports the ZIM format, a highly compressed open format with additional meta-data. It is intended for use in schools, universities, and libraries which can't afford broadband Internet access. It features a full text search engine, bookmarks and notes, an HTTP server, PDF/HTML export, a user interface in more than 80 languages, tabbed navigation, and an integrated content manager and downloader.
Kipt (Kizome's ISA Piercing Tool) is an HTTP proxy server and proxying name server with the ability to forward requests to other HTTP proxies or to get the documents directly from hosts. It can go through MS ISA Server or MS Proxy doing NTLM authentication. If you're stuck behind a restrictive firewall or proxy with at least one port open for outgoing connections and you have access to a machine outside, you can have nearly full Internet access by using this proxy and the socksify program from dante.
Klactoveedsedstene is a cross-platform graphical audio front-end to MPlayer. It has advanced support for album art. It recognizes embedded album art, and is also mostly able to find the correct album art from the Internet based on the Metadata tags. It features fast startup, Select and Play, an all-in-one window, and the ability to drag and drop music into the library. It supports ape, FLAC, Ogg, MP3, MPC, WAV, and WMA. It is highly configurable and stateful (remembers your window settings). All parts of the GUI can be colored. It has Album-Artist-Track view. All track columns are sortable and movable. The interface can be minimized.
The KlassModeler is a tool for visually creating and documenting classes. It is not unlike other UML design tools except for four major differences: it focuses only on the class-diagramming aspects of UML and leaves out the use cases, actors, and other things, it generates code, it reads existing C++ header files, and it can create HTML documentation.
Klen-library is a program for creating electronic books. It consists of three modules, for editing books, reading books, and creating tests. It offers password protection of every book and the editing mode. The print function makes it self-sufficient, as it allows creation of books without using third-party text editors. It uses SQLite, so you don't have to install a database server. It can export to the XWB, HTML, TXT, PDF, PostScript, and RTF formats, and can import from XWB, HTML, and TXT.