Boss Ian McParland told BBC Radio Nottingham: "Jason has been the perfect professional. He trains as if he's 18 and when he plays he gives his all.
"That's why he's stayed in the game until 36. Some younger players should look at how he conducts himself."
The list of departures also includes Austin McCann, Lee Canoville, Andy Parkinson, Gary Silk and another ex - Shot, Matt Somner.
On County's official retained list, only keeper Kevin Pilkington, defender Mike Edwards and youngster Stef Frost, of the players due to be out of contract, have been offered new deals.
"You want to freshen things up and juggle things about," said McParland. "But it's not a nice time of year. I've been in with managers when they've told me I've not had a job. It's a cruel game."