A Upup is a Puppy that has some compatibility with Ubuntu. Typically produced using Woof with Ubuntu packages. Often they are named after the Ubuntu version name, for example Lucid, Jaunty and Precise

PuppyPrecise - Upup created by BarryK
Lucid - popular Upup and official community Puppy from version 5.00 to 5.28 developed by playdayz

PuppyPrecise developed by BarryK, see Precise Puppy beta7 announcement
Ov-Precise 5.3.0 developed by Oldyeller, see Ov-Precise 5.3.0 thread
Upup Precise developed by pemasu, see version Upup Precise 5.3.3.3 with kernel 3.3.2 thread

Jaunty Puppy Alpha9, developed by BarryK, see Jaunty Puppy Alpha9 feedback