Looking to GM Any Pre-Made Campaigns?

This would be my first time GMing a campaign, in order to speed up the preparation process I am looking for a premade adventure for Dungeons and Dragons 3.5 or Dungeons and Dragons 5th Edition. If anyone could tell me some good places to get some that would help a lot. As a side note, I would prefer if the pre-made campaign is free.

Pathfinder is very similar to D&D3.5. I ran <a href="https://marketplace.roll20.net/browse/module/1/a0" rel="nofollow">https://marketplace.roll20.net/browse/module/1/a0</a>... as a 3.5 campaign (just modifying a few of the pathfinder only stuff that I didn't like) for my group. And that one comes largely set up for you. :) I've also been running old paper modules I purchased years ago though in that case I'm doing a lot more work; importing and cleaning up the maps and converting monsters since they are old AD&D modules. We've had fun though. :D

There are several out there, the wayfinder fan-mag from paizo usually has a free adventure in it, but again, it's pathfinder. Paizo sells a much of adventure paths that can easily be converted for VTT play since they have digital map PDFs. They're around $15 each which is well worth it. Then again, much of this is pathfinder. 3.5,5e,4e,AD&D,OD&D require more restrictive licensing so most modules and adventures you'll need to buy.

I think Keep on the Shadowfell is now free from the wizards archives. Its 4e but you could convert it I easily enough.

Keep on the Shadowfell is also awful. I just feel that should be mentioned.

<a href="http://www.freerpgday.com/" rel="nofollow">http://www.freerpgday.com/</a>

Don't forget the Pathfinder Conversion Guide for 3.5 to Pathfinder is a free download as well ( <a href="http://paizo.com/products/btpy89m6?Pathfinder-Role" rel="nofollow">http://paizo.com/products/btpy89m6?Pathfinder-Role</a>... )