Alle
Arcane
Aspen
Atlas
(Marvel)
Avatar
Chaos
CrossGen
Dark Horse
DC
Dell
Digital Webbing
Disney
Epic
(Marvel)
Fawcett Publication
Harris & Top Cow
Image & Aspen
Image & Top Cow
London Night
Max Comics
(Marvel)
Star Comics
(Marvel)
Top Cow & Dynamite
Unknown
Zenescope

X Terminators US
The X Terminators first appears in their own series and are disbanded in the aftermath of Inferno with X Factor #40.
X-Men Vol. 2 US
(First volume is actually "Uncanny X-Men" #1-141 as this had the title "X-Men" until #114 and first "officially" became "Uncanny X-Men" from #142 and onwards)
X-Men - Blinded by the Light US
X-Men: Blinded by the Light TPB (2007) - X-Men #200-204 - 120 pages
X-Men - Divided We Stand US
X-Men: Divided We Stand TPB (2008) - (Messiah CompleX Aftermath) X-Men: Divided We Stand (2008) #1-2 & X-Men: Messiah Complex Mutant Files (2007) - 136 pages
X-Men - Endangered Species US
X-Men: Endangered Species TPB (2008) - X-Men: Endangered Species (2007) one-shot and Chapters 1-17 - 192 pages
X-Men - Original Sin US
X-Men: Original Sin TPB (2009) - X-Men: Legacy (2008) #217-218, Wolverine: Origins #28-30 and X-Men: Original Sin (2008) - 144 pages