- Xe-INGEN
- Xebec
- Xedos
- Xeer
- XEL-1
- Xelibri
- Xemacs
- Xen
- Xenacanthus
- Xenacoelomorpha
- Xenaporus
- XenApp
- Xenaroswelliana deltakvadrant
- Xenastrapotherium
- Xenia (emulator)
- Xenidae
- Xenix
- Xeno
- Xenoblade Chronicles
- Xenoblade Chronicles 2
- Xenoblade Chronicles 3
- Xenoblade Chronicles X
- Xenochrophis asperrimus
- Xenococcus annandalei
- Xenodermatidae
- Xenodon pulcher
- Xenodusa
- Xenogears
- Andinsk knurhårugle
- Xenoglena
- Xenokeryx amidalae
- Xenomai
- Xenomyrmex
- Xenomys nelsoni
- Xenon
- Xenonauter
- Xenonauter 2
- XENON (eksperiment)
- Xenoperdix udzungwensis
- Xenophyes cascus
- Xenophyllomyza deserticola
- Xenopsylla
- Xenopteryx setosus
- Xenorophidae
- Xenosphex
- Xenosphex boharti
- Xenosphex timberlakei
- Xenosphex xerophilus
- Xenos (chip)
- Xenoturbella
- Xenoturbella churro
- XENPAK
- Xentrix
- Xenus: Kogepunkt
- Xenusion auerswaldae
- Xenilla
- Xeon
- Xeon Phi
- Xerces
- Xericeps
- Xerinae
- Xerini
- Xerochrysum
- Xerocomus hortonii
- Xerolitor explicatus
- Xeromantispa scabrosa
- Xerophyta stenophylla
- Xerorchis
- Xerospermophilus
- Xerox
- Xerox Alto
- Xerox netværkstjenester
- Xerox NoteTaker
- Xerox PARC
- Xero (virksomhed)
- Xestobium
- Xestocephalinae
- Xestocephalus
- XeTeX
- Xetra
- XEUS
- Xevious
- Xevious (spilserie)
- Xexex