Off the top of head, I can think of:
www.daveseslcafe.com <- Very well known website for english teaching jobs worldwide, has a section just for China.
www.elong.net,
english.ctrip.com <- Plane tickets + hotel reservations in China,
www.zuji.com.hk for HK.
www.qunar.com for the chinese equivalent of Kayak, but no english version.
www.easyclicktravel.com <- The only website I've used that accepts Paypal (
including non-US based accounts) for purchasing international plane tickets.
exploreshanghai.com <- Useful website for finding opening/closing times, journey time, ticket prices for the Shanghai metro. Also has for Beijing, Guangzhou, HK, Singapore, Taipei, Seoul
www.moneybookers.com <- Not exactly the most efficient way of sending money abroad, but very easy (all online) and fast enough, with plenty of paying/receiving options. Used here a few times for urgent payments.