I was browsing the Marketplace (again...it's like my favorite SL activity these days, haha) and I found tons of free and cheap makeup. Below is only a small example of what you can find. The first picture on the top left is a skin with no makeup. The rest are how it looks with the layers on. Results may vary, of course. Enjoy!
WORN:
Skin: Tuli
Hair: Exxess
Top Photo, Left to Right:
1. (no makeup on skin by Tuli)
2.Eyelure, 1L
3. Natural Beauty, free ,also includes sculpted lashes
4. R3i, free
5. Pautina, free ,includes multiple wear options
Second Photo, Left to Right:
1. R3i, free
2. Glamorize, 5L, includes eye shadow and teeth option as well
3. Glamorize, 5L ,includes teeth option as well
4. Glamorize, 16L ,many colors included
5. Glamorize, 1L ,lipstick and blush included as well