Great cage for temporary housing, travel, vet visits, etc. Easy to make and relatively cheap! NOT intended as permanent housing however!
My go-to guide for mice/rats/hamsters/gerbils
An awesome cage great for rats and similar that like to climb (not so great for mice and smaller guys though).
Excellent detailed information about caring for Orphaned baby rats, although I prefer using strictly KMR.
GREAT information about caring for orphaned mice, a supplement to the Rathelp version for rats.
A great page to help you figure out how old your orphaned rat(s) are.
A great page to determine how old your orphaned mice are.
General mouse care information including a cage calculator to determine the size cage you'd need for x amount of mice.