Gloucestershire sign Stuart Whittingham after the right-arm fast bowler is released from his contract at Sussex.
Somerset fast bowler Josh Davey signs a new two-year contract to remain at Taunton until at least September 2020.
Tom Sole signs a two-year deal with Northamptonshire, while Charlie Thurston is handed a one-year summer contract.
"Strong candidates" will be vying to be Scotland's new head coach, says former England captain Michael Vaughan.
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Following a stunning first win over England and two Twenty20 losses to Pakistan, Scotland captain Kyle Coetzer wants more opportunities against the top sides.
Analysis and opinion from the BBC's cricket correspondent.
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BBC Sport brings you live radio commentary from England's Test series against India.
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How to get into cricket
How to get into cricket - physical exertion with a chess-like element in matches which range from half an hour to five days.