Awwww

Kittens hanging from tree limbs by one paw
Tiny puppies looking up from inside enormous boxes
Small children wearing adult suitcoats, ties, and fedoras
Precious Moments anything
Most every photo on This website

saccharine
adjective
Overly sweet Synonyms: cloying, syrupy, treacly.
"saccharine." WordNet 1.7.1. Princeton University, 2001. Answers.com 14 Dec. 2005. http://www.answers.com/topic/saccharine

That website is actually poking fun at cutesy, but one can find a veritable smorgasbord of visual schmaltz there.

schmaltz
noun, informal.
1. Excessively sentimental art or music.
2. Maudlin sentimentality.
3. Liquid fat, especially chicken fat.
[Yiddish shmalts, animal fat, sentimentality, from Middle High German smalz, animal fat, from Old High German.]
"schmaltz." The American Heritage® Dictionary of the English Language, Fourth Edition. Houghton Mifflin Company, 2004. Answers.com 14 Dec. 2005. http://www.answers.com/topic/schmaltz