The Sims 2 Expansion Packs: University Was the First, Here's the Full Release Order

Correction: The Sims 2: University (Mar 2005) was the first expansion pack, not the last. The final EP was Apartment Life (Aug 2008).

Full Release Order (Expansion Packs)

1. University (Mar 2005)
2. Nightlife (Mar 2005)
3. Open for Business (Mar 2006)
4. Pets (Oct 2006)
5. Seasons (Mar 2007)
6. Bon Voyage (Sep 2007)
7. FreeTime (Feb 2008)
8. Apartment Life (Aug 2008) ← Last EP

Stuff Packs (after Apartment Life)

9. Mansion & Garden Stuff (Apr 2008)
10. Kitchen & Bath Interior Design Stuff (Apr 2008)
11. IKEA Home Stuff (Jun 2008)
12. Family Fun Stuff (Apr 2009)
13. H&M Fashion Stuff (Mar 2010) ← Final TS2 release

No games released after H&M Fashion Stuff (2010) until The Sims 3 (2009 base, but TS2 line ended).