x2x
Sharing keyboard, mouse and clipboard between two X servers.
XamimeLT
Email content control, policy-enforcement filtering system.
X-Bc
A GUI to bc, a scientific calculator. xCHM
XCHM is a .chm viewer for UNIX (Linux, *BSD, Solaris). X-Designer
Cross-platform GUI Builder for X/Motif, Windows and Java. XFce
Lightweight yet powerfull desktop environment. XGngeo
A frontend for Gngeo, a Neo Geo emulator. xlightframe
XLightFrame - Philips LightFrame2 for X. XMapper
XMapper for the management of XSLT Transformations.
XML Enhancements for Java
Quickly Integrate XML in Java apps for Linux. xmlwrapp
Modern C++ XML Parser Wrapper.
xnc
Filemanager for X Window. XOTcl
Object-oriented scripting language. XPontus XML Editor
A free java based XML Editor. XShipWars
Massivly multiplayer space-oriented gamming system. YaBASIC
Small, fast, cross-platform BASIC interpreter. YAPET
Text based password manager. yudit
Unicode text editor.