The former Republic of Ireland international has signed on a non-contract basis.
The 35-year old, who has also played for Crystal Palace and Birmingham City, left Colchester United at the end of last season.
The striker is available to play for the Grecians in their League Two game at Accrington Stanley tomorrow night.
Tank shell shut downs recycling centre
No one was hurt
Exeter's Royal Clarence hotel to be restored
'Progress is moving fast'
Man sought after alleged Plymouth assualt
Police would like to identify man
Cornwall ‘shafted’ by D&C Police, says leading councillor
Cllr Andrew Mitchell made his feelings known
Torbay's bigger buses outgrow streets
'Operating buses of this size on those roads would create safety and reliability issues'
Anger at plans for 700 homes in Exmouth
They're unhappy about proximity to heath
