Due to the growing tension between Palestine and Israel that includes military actions in the sector of Gaza, several hacktivists groups have united in a cyber-attack campaign against Israel, named #OpSaveGaza.
From information that was found online (Twitter #OpSaveGaza and Facebook), AnonGhost and other hacktivist groups claim to have successfully defaced over 500 Israeli websites and leaked some government email credentials. In addition, some government sites have been targeted for DDoS attacks.
A link to DoS tools on the #OpSaveGaza page indicates a few of the tools that will be used. Most of them are known, such as HOIC, LOIC and ByteDos.