I recently started a scientific initiation in a laboratory at my university. We are a little short of money and in need of new computer. Is there any free program (for Ubuntu, preferably) that allows two users too log in and use the machine simultaneously for diferent purposes?
There is something on Ubuntu called MultiSeat:
a single machine that supports multiple concurrent users each with their own set of keyboards, mice, and monitors providing a traditional desktop experience to each user.
Please see the link for more details.
Also, there is the SE Ubuntu forum for more specific questions.