My second creation from the last couples of days (actually made it first) is my retractable workbench. I am really cheap when it comes to making things so I used nearly all leftover pieces from other projects or salvaged pieces from things I've taken apart.
And down:
For the top I used the base of a freestanding closet that was left in my house by the former owner.
I attached it to the wall using four hinges and affixed two hinged 4x4 legs to the base using a scrap fencepost.
The chains serves as extra support in case the legs get knocked out from under it and also to secure it in the upright fashion. This was much easier than making a large stable bench using new lumber and MUCH cheaper. Total cost for the hinges / screws / hooks / chain was approximately $35-40.