Right now on the e.l.f. site (no end-date given), when you purchase any three items from the Spring Playbook on THIS PAGE, you will receive free shipping (no code required). Plus, you can enter code METAL at checkout to receive a free gift with ANY order (ends 4/18).
What's the free gift, you ask? Well I just tested out the code and I received the e.l.f. Cream Liner in Teal Tease (which comes with the brush pictured above) as my free gift. Per the e.l.f. site, the shade you receive will be randomly given. So after you add the code to your cart, you'll see which shade they gave you.
If you're not interested in the free Cream Liner, here are some other codes to try:
BDAYFREE - free Day to Night Eyeshadow Palette in Party Ready ($10 value) with any $15+ order
SHIP25 - free shipping on orders $25+ (use if you want items not on the Spring Playbook page)
Hope that helps!