Comment by borealis-dev

One time I actually came in on the Saturday after my last day to put the finishing touches on my final deliverable. I don't think you should follow my example to that extreme, but it's advisable to try to wrap up everything before you go to leave a good impression on your co-workers; they won't be too happy if you leave a mess for them to clean up. For me, personally, those contacts led to multiple later employment opportunities.