If what you're looking for are entirely new widgets (i.e. a video player widget, an audio player widget, a slide out drawer widget, etc.) that would appear in the Widget Library and work like the other widgets, then morgan_in_london's response is correct. The Muse Widget Library is currently limited to the set of widgets in the product.
Many HTML widgets can be used via the Insert HTML feature (i.e. Google maps, YouTube videos, FaceBook like buttons, etc.), but they generally don't offer the ease-of-use or flexibility of the built-in Muse widgets. A third party, www.muse-themes.com, has started an online directory of Insert HTML-based widgets for use with Muse that can be found at http://www.muse-themes.com/pages/muse-widget-directory.
If what your looking for is a library of examples that demonstrate what's possible with the current widgets in Muse (which have many different behavior and formatting options), we're in the process of putting together the start of a gallery of example widgets that should be live online soon.
Hi there Eric loks like your busy with Muse which is great. My name is Chris Kellett and I work with the team at museGrid.com. I have some great news for you we have a host of ready to use Muse widgets for you to download. You can view and play with them first then download and simple copy and past them into your project. As they are built on top of the Muse built in compositions they are fully editable within the software itself.
Take a look for yourself - http://www.musegrid.com/adobe-muse-widgets
If you have a specific request feel free to ask us and we will see what we can do.
P.S Oh yeah forgot to mention we have a ton of free tutorial videos for you as well so dont forget to signup for the newsletter and join us on Facebook to be kept up to date with our free Muse education program.
Musegrid seems great and the tutorial really sold me - so I paid the $9.99 - and now these things (button, sliders) appear on my page once I publish my temporary site, but have no funcionality.
Mr. Kellot - or anyone out there - please advise. Should all be so easy, per the video - but simply not working.
ps I am using the Muse CC and also the sample mp3 files you supply.
If you're experiencing trouble and would like to experiment with more than one widget, please feel free to checkout the massive widget library over at MuseThemes. We charge one low annual fee for unlimited downloads of our entire library.
Can you send us a link so we can see what you are experienceing?
Also for future reference you can contact us direct for support on our Live chat which is live for at least 12 hours per day.
Or contact us for support here - http://www.musegrid.com/contact
We look forward to hearing from you.