Elements: Are there any free extensions that I could add?

Hey there Michael,  

I think Photoshop has all the extensions you'll want for images.   My own website has almost every extension known for any image, still or video, since I deal with nothing but that and you can see them here http://pixsavers.com/photoformats.html.   Maybe there a few you didn't know about.   I'm not sure if we can build our own.   

Steve Lehman, MCSE   

I'm not sure if you're asking about file extentions or add on to the software.  I use Topaz Labs filters and there is something called InPixio Photo Clip

You are probably referring to plug-ins.  Topaz Labs, Filter Forge, Nik Collection, ON1, etc.  Many cost money.  Some you can get free trials.  Someone on another thread mentioned this: http://www.redfieldplugins.com/index.htm

Plugins mentioned are good ones.  Many mimic the same features in Photoshop.  Study other plugins to beware that the source is not familiar and could be hazardous. Worth a mention.   

> Are there any free extensions that I could add to Photoshop Elements 2018? I'm new to the latest version & it was many years ago since I use Photoshop.>

You can go to Window > Find Extensions on the Exchange to find a number of free and for pay (usually nominal amounts) extensions. They do all kinds of things.  Making your own is another matter. If you have programming skills, you can find developers who do just that to hang out with. Google is your friend.

If you're really thinking of making your own filters, the Filter Forge already mentioned is geared towards that goal. It isn't free, but it is designed to let you create your own filters, as well as access a number that the community have already made. https://www.filterforge.com/