Glenda and Friends
Glenda's adventures playing marbles with hir(sic) friends... Glenda not only has a space helmet, but also has invisible underpants!
Gordon the Go Gopher

Gordon is the mascot for Google's Go programming language. Also was also created by Renée French.
And its brother (or sister?) the WMFU Gopher:

Gordon in Russia with an ushanka and a balalaika.

Tux's enjoys a friendly backscratch of Glenda's chainsaw

(Original credit by Ronald G Minnich at LANL?)
Tux also wants to be a cute bunny...

... but sadly the results are not quite as good as he would like.
When Lucent and Alcatel merged, Maurice became Glenda's French counterpart

The Fish from LSUB's Plan B

and his friend the octopus

The LP49 Tanuki

Glenda is Mothra Compatible

rabbit!bimmler
[picture not available]
OS-tans
By some crazy japanese people.
Plan 9-tan
Plan B-tan
Octopus-tan 
The 9-tan family:

Plan 9-tan and Inferno-tan:

Plan B-tan and Octopus-tan:

