Oded, I think you are not going to find what you are looking for, not all in one place at any rate.
In hardcopy I have an old edition of Chambers Dictionary, Websters Comprehensive Dictionary (assists with many names), an atlas, an old edition of the Oxford Book of Quotations, Roget's Thesaurus, and a couple of indexes of artists and musicians come in handy sometimes. Occasionally a Latin dictionary, or other dictionaries prove useful.
Online there are various useful sources. I wasn't aware of the Scottish source above. There are also various anagram sites, utsire and chambers perhaps have the largest vocabulary. For missing letters, onelook can be very useful from time to time.