Stone Temple Pilots have a brand new track featuring Chester Bennington! It's called "Out of Time" and you can download it for free at Radio.com.
Chester also performed the song live with STP at Weenie Roast 2013:
“I’ve loved STP since I was 13 years old and they’ve had a huge influence on me,” explained Bennington. “When the opportunity came up to do something creative with them, I jumped at the chance. The guys in Linkin Park have been incredibly supportive of me undertaking this project while I’ve continued to work on new music with LP.”