Java

         Java Docs and Apis          

                                                C/C++

                                                    Programming in C   

                                                    C elements of style                   

                                                    Thinking in C++ ( A very good and detailed book on C++)

                                                    C++ Tutorial  

                                                    S/W design using C++                     

                                                    All About Compiling and Linking

        Linux

            Linux Docs

                                             Computer Ebooks

                                                      ebooks  ( A very useful site which contain lots and lots of books)

                                                     CS Library of Stanford

         Puzzles and Interview Questions

            Technical Interview Questions

            Maths and Logic Puzzles

            Puzzles

                                        Quotations

                                                Quotes and Cards

                                                Desktop wallpaper