Wargaming has partnered with Team Rubicon to offer World of Warships players a number of special bundles. 100% of proceeds from the sales of these bundles (ranging in price from $5 to $25) will be sent to Team Rubicon, a charity operation with members transitioning from military service and offering them an opportunity to assist those affected by domestic and international natural disasters.
In lieu of purchasing a WoWS bundle, Wargaming also encourages its players to go directly to the Team Rubicon site to make a donation. Wargaming will match all donations made this way "dollar for dollar" up to $20,000.
You can see the bundles and learn more by visiting the World of Warships site.