The top one with the black dial is an M Force. It's a nice enough watch, works well though I'm not keen on th hands.
The one on the bottom left is a slide rule watch. It's a decent inexpensive, reliable watch which retailed at below £150 and according to some reviews the best slide rule watch before you start looking at Breitling equivalents.
Bottom right is a 70s classic styled Orient. It's mechanically sound so I guess it was well made. The picture doesn't do it justice as the dial is a stunning rich green which goes well with the mesh strap.