I'm using a 2nd-hand Omnibook 6100 which is from 2000-2001. It still works, and it's pretty powerful, so I use it. The main reason is the CPU fan almost never

I'm using a 2nd-hand Omnibook 6100 which is from 2000-2001. It still works, and it's pretty powerful, so I use it. The main reason is the CPU fan almost never comes on, so it's a quietbook. Other than that, software development on it is a good idea, because if it runs adequately on this, it'll run blazingly faster on a new machine!