There's a tri-color (probably female) cat hanging around the Coffee to Go, at the main entrance to Tel Aviv University. What she does is pass through the people sitting there, eating and drinking, while possibly looking for leftovers to eat. She's pretty friendly.
There's a cat at the lawn outside the university right near the "Social Studies building". I can see him (or her) consistenly when biking through on Haim Levanon st. He's usually sitting on the edge of the stone fence, just resting.
When I passed through the other day, he was on the sidewalk, and acting strange, going around in circles. Maybe he was looking for something. I got off the bike and patted him (he let me), but he wasn't content with it either.
There's a female cat in Schreiber in TAU (where we hold the Tel Aviv Linux club presentations). People call her "Bruriyah" and she is considered the "Be'alim" (= owner) of Shcreiber. She's half-black half-white and not tri-color.