Jim Allenby has been released from his contract with Glamorgan and is joining Somerset.
Former England opener Nick Compton has departed Somerset by mutual agreement with immediate effect.
Somerset all-rounder Peter Trego has signed a contract extension until at least the end of the 2016 season.
Former Zimbabwe skipper Dave Houghton is to step down as the batting coach for Somerset.
Pakistan bowler Abdur Rehman will return to Somerset for a second spell after signing terms for 2015.
Somerset fast bowler Alfonso Thomas has had surgery on a broken ankle after falling while playing golf.
George Dockrell has signed a contract extension with Somerset to stay with the county until the end of next season.
The contrast in fortunes on the two sides of the Pennines was stark as Yorkshire took the title
Somerset have appointed Matthew Maynard as their new Director of Cricket.
Division One champions Yorkshire had to settle for a dramatic draw against Somerset in their final match of the season.
Jeetan Patel has been named county cricket's Most Valuable Player, according to the FTI rankings.
Warwickshire completed a crushing LV= County Championship win over Durham inside three days at Edgbaston.
Lancashire ended the second day against relegation rivals Middlesex on 259-6, meaning they lead by 41 at Old Trafford.
Lancashire bowled relegation rivals Middlesex out for 214 on the opening day of their crucial fixture at Old Trafford.
The ECB has recruited Andy Hurry and Raph Brandon for key roles at the National Cricket Performance Centre.
Somerset has awarded contracts to five young players including wicket-keepers Alex Barrow and James Regan.
An unbeaten double century from Chris Rogers helped Middlesex battle out a draw on the final day with Somerset.
Chris Rushworth came agonisingly close to claiming 10 wickets in an innings as Durham crushed poor Northamptonshire.
Middlesex were reduced to 64-7 in reply to Somerset's first-innings 523-9 declared on day two at Taunton.
Craig Kieswetter marked his return to action by digging Somerset out of a hole on day one against Middlesex.
South Africa batsman Alviro Petersen has left Somerset as he continues to struggle with a knee injury.
Adil Rashid took 5-117 as Yorkshire completed a vital innings and 18-run victory over Lancashire at Old Trafford.
Yorkshire moved into a commanding lead against Lancashire as Paul Collingwood and Durham defied Nottinghamshire.
Tom Abell, Jack Leach, Craig Meschede and Johann Myburgh have signed new contracts with Somerset.
Surrey have signed all-rounder James Burke from Somerset on a two-year deal.