| Plausible Pseudonym |
The easiest way to find these is to get ahold of a book (pdf) or searchable online repository with spells and do a search for "will partial," "reflex partial," and "fortitude partial."
Doing this on Occult Adventures, for example, found 9 spells that have a partial effect on a Will save, two for Reflex, and three for Fortitude. (One of those spells, Psychic Crush I-V, is partial for both Will and Fortitude saves.)