Remember the pressurized repair / assembly pods from 2001 A Space Odyssey and so many other space visionary works? Has there been any programs to design & build tiny vehicles like that with manipulator arms, for space stations or construction in space?
It appears to be purely in the proposal stage.
The concept was more common in the '50s and '60s. You can see a lot of concept art at the wonderful Atomic Rockets page (search the page for "A space pod is a small pressurized vehicle" - the page is gigantic).