As mentioned in various places around this section of the forums, what you want is much harder than it seems.
AddOn A:
r123
r124
r125
1.3
r127
AddOn B:
2.8
2.9
2.10
2.11
AddOn C:
2.08
2.09
2.10
2.11
AddOn D:
alpha 1
alpha 2
alpha 3
beta 1
beta 2
release 1
alpha 1.1
alpha 1.2
/edit: not to mention that a different version could be used on each site.... Or at least labelled differently. 1.3 vs. v1.3 vs. 1.3 Release. I've seen it happen.