There are various translations of the books of the Khuddaka Nikaya.
In particular, there are dozens of the Dhammapada (often terrible, often free...).
I like John Ireland's translation of the Udana and the Itivuttaka (available as one volume).
The Sutta Nipata is very interesting. Unfortunately the print versions I know about seem rather expensive for the size. Most of it is on Access to Insight, otherwise at http://awake.kiev.ua/dhamma/tipitaka/2S ... index.html