xflr5 documentation
Documentation for xgridfit
documentation for the eXtensible Multi-Dimensional Simulator
XML Document Formatter documentation
X event recorder/replayer - documentation
Python-powered, cross-platform, Unix-gazing shell (documentation)
Miscellaneous documentation for the X.org X Window System
Core documentation for the X.org X Window System
Extended Object Tcl (XOTcl): Object orientation for Tcl - manual
Documentation for Yacas
Platform for discrete element modeling. Documentation
HTML documentation for YARA
Ruby documentation tool - documentation
Documentation and examples for Yaws webserver
YAZ Z39.50 toolkit (documentation)
Documentation for Your Own Document Language (Yodl)
documentation for the Yorick interpreted language
Documentation for Yoshimi
Documentation for Yosys
build tool for C/C++ projects using modular components (documentation)
Unicode text editor (Documentation)
Finite Element Analysis Program - documentation
zsh documentation - info/HTML format
command line software manager using libzypp (documentation)