JHighlight is an embeddable Java syntax highlighting library that supports Java, Groovy, C++, HTML, XHTML, XML, and LZX languages and outputs to XHTML. The library can be used in several ways: embedded into another tool (for instance a blog or forum), through the command-line to generate highlighted files locally, or as a servlet filter to highlight source files on your server on-the- fly. It also supports RIFE templates tags and highlights them clearly so that you can easily identify the difference between your RIFE markup and the actual marked up source.
The Heirloom Documentation Tools provide troff, nroff, and related utilities to format manual pages and other documents for output on terminals and printers. They are portable and enhanced versions of the respective OpenSolaris utilities, which descend from ditroff and the historical Unix troff. troff provides advanced typographical features such as kerning, tracking, and hanging characters. It can access PostScript Type 1, OpenType, and TrueType fonts directly. Internationalized hyphenation, international paper sizes, and UTF-8 input are supported.
OpenGrok is a fast and usable source code search and cross reference engine. It helps you search, cross-reference, and navigate your source tree. It can understand various program file formats and version control histories like Mercurial, Bazaar, Git, ClearCase, Perforce, SCCS, RCS, CVS, or Subversion. In other words, it lets you grok (profoundly understand) the source.