1. Cool Reader
Cool Reader is fast and small cross-platform XML/CSS based E-Book reader for desktops and handheld devices. Supported formats: FB2, TXT, RTF, DOC, TCR, HTML, EPUB, CHM, PDB, MOBI. Platforms: Win32, Linux, Android. Ported on some eInk based devices.
2. TeXnicCenter
TeXnicCenter is what we call an integrated documentation environment (IDE) for LaTeX. That means that TeXnicCenter integrates all the functionality you need to create, write, build, fix, view and print your LaTeX documents. TeXnicCenter’s innovative user interface, its powerful features, its large community (more than 1,000,000 users all over the world) and the fact that it is Free Open Source Software (GPL) makes it the first choice for LaTeX authors working on the Windows platform. Read on to learn, what TeXnicCenter can do for you!
3. XDXF - XML Dictionary Exchange Format
XDXF stands for XML Dictionary Exchange Format, and specifies a semantic format for storing dictionaries. The format is open and free to use for everyone. XDXF is a project to unite all existing open dictionaries and provide both users and developers with universal XML-based format, convertible from and to other popular formats like Mova, PtkDic, StarDict, ABBYY Lingvo etc.
4. XML Copy Editor
XML Copy Editor is a fast, free, validating XML editor.
XML Copy Editor is free software released under the GNU General Public License. It is available in Catalan, Chinese (simplified and traditional), Dutch, English, French, German, Italian, Slovak, Swedish and Ukrainian. There are Linux packages for Arch, Fedora, Gentoo,openSUSE, Slackware and Ubuntu. A WinPenPack portable version is also available.
5. HTML2PDF
HTML2PDF is a PHP class using FPDF for the PHP4 release, and TCPDF for the PHP5 release. It can convert valid HTML and xHTML to PDF. More details and examples on HTML2PDF.