FINIS Tempo Trainer Pro Set by Strokes per Minute, Seconds per Stroke, Beep after a Set Time and other uses for swimmers, runners and cyclists.
Anatomy for Runners: Unlocking Your Athletic Potential for Health, Speed, and Injury Prevention One of the best overall books explaining weaknesses in runners and how to avoid them.
Garmin Fenix 3 Sapphire GPS Multisport Watch with Outdoor Navigation and Heart Rate Monitor The perfect Multi Sport watch - even in the pool.

Also good for skiers, walkers and open water sports enthusiasts.
Phantom Aquatics Swimmer's Air-Ease Snorkel Probably the best book ever written covering all aspects of swimming and all strokes.
Shimano SH-SD66L Shoe black Size 47/48 2016 bike shoes A super tool to improve your stroke mechanics.
Beco PULLKICK kickboard - swimming fitness training Great for summer riding or when you're on holiday if you use SPD pedals.
Running Science (Sport Science) Only take one item to the pool instead of two with this Pull buoy and Kick board
Maru Kids Training Equipment, Pink, Small One of the best books on running mechanics and training you can buy
Oakley Racing Jacket Sunglasses Fog Positive Red Iridium & Black Iridium Size:TU A very good basic paddle. Only put one finger in the middle selector for maximum stroke correction. That way it isn't just a resistance training tool.
Speedo Adult Biofuse Training Fin, Red / Black, Size 8-9 Great Price on these classic racing glasses