Coda

https://panic.com/coda/

Google WebDesigner

https://www.google.com/webdesigner/

Hammer for Mac

http://hammerformac.com

Rapid Weaver

http://realmacsoftware.com/rapidweave/

Live Reload

http://livereload.com

XRAY

http://westciv.com/xray/

Ember

http://realmacsoftware.com/ember/