I think that an API to access the saves' data would help those who would like to post their creations outside this site.
It might be like this: you request a save by its ID and the server returns the data encoded in some way, for example JSON:

https://powdertoy.co.uk/Browse/View.html?ID=467931&type=json

returns:

{
'id':'467931',
'name':'Mini Bombshooter',
'author':'Lord-Spectre',
'preview':'url to preview image'
}

or XML:

https://powdertoy.co.uk/Browse/View.html?ID=467931&type=xml

returns:

<save id="467931">
<name>Mini Bombshooter</name>
<author>Lord-Spectre</author>
<preview>url to preview image</preview>
</save>

P.S. to moderators: I don't want to publicize my save in the examples above, if you want I'll change it to a neutral one
P.S. to developers: If you approve ths but need help coding it, I could help...

So it just changes "html" to "json" in the save's URL? Great, thank you and who had this great idea.
P.S. XML was only an example
EDIT: no preview... any chanche this will be added?
EDIT2: This also work with users' profiles, but not with users' saves list. Again, will this be implemented?

The first returns an image, so binary data that seems strange characters. Try to save it with extension .png and open it with an image viewer.
EDIT: I didn't understand how to

Simon:

query "user:Simon"