The gold standard for top ten lists is undoubtedly Sight and Sound magazine, which has been polling critics once a decade since 1952 and filmmakers since 1992. In addition to the main top ten lists, there are all sorts of marvelous films to discover in the full lists of 2002 polling results.
The Academy of Motion Picture Arts And Sciences (Oscars.org) has a list of current nominees and past winners, including a searchable database.
The American Film Institute's 10 Top 10 site offers a handy distillation of their various 100 Years 100 Films lists. Access to the full lists requires registration on the AFI website.
Historically, the Cannes Film Festival has been a major forum for identifying talented filmmakers worldwide. Here is the full list of 2014 award winners, along with an archive of past winners.
The Hollywood Foreign Press Association's Golden Globe Awards website also maintains a searchable database of past and present nominees.