I've used a couple of these but the best by far IMO is the Crescent Indexing Decking Removal Tool.
No one wants to use any other took on deck demo, and yep it pulls screws right out too (or they pull through if wood rotted). It's also done several residential demos for me and is going strong. The indexing lets you adjust to perfect angle for each job or circumstance, such as pulling plaster overhead, or off walls or deckboards.
5 stars! http://www.crescenttool.com/crescent-dkb44x-bull-bar-44-indexing-decking-removal-tool.html
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