My emacs configuration ...

.emacs

;; Add ~/.elisp directory to my load path.
;; Not needed since .emacs.d is read by default
(add-to-list 'load-path' "~/.emacs.d")

;; Show trailing white spaces
(setq-default show-trailing-whitespace t)
(set-face-background 'trailing-whitespace "#191970")

;; Adds Other Package manager repositories
(require 'package)
(add-to-list 'package-archives
             '("elpa" . "http://tromey.com/elpa/"))
(add-to-list 'package-archives
             '("marmalade" . "http://marmalade-repo.org/packages/"))
(add-to-list 'package-archives
             '("melpa" . "http://melpa.milkbox.net/packages/"))

;; Adds TangoTango Theme
(load-theme 'tangotango t)

;; New buffer opens in vertical buffer by default
;; http://stackoverflow.com/q/3389147
(setq split-height-threshold nil)
(setq split-width-threshold 0)

;; Auto-complete mode stuff (Only for c/c++ and maybe other langs)
;; http://cx4a.org/software/auto-complete/
(require 'auto-complete-config)
(add-to-list 'ac-dictionary-directories "~/.emacs.d//ac-dict")
(ac-config-default)

;; Scroll one line at a time
(setq scroll-step            2)
;;      scroll-conservatively  10000)

;; Delay timer for JIT, faster loading of documents
(setq jit-lock-defer-time 0.05)

;; dired stuff
;; Hide uninteresting files
;; http://www.emacswiki.org/emacs/DiredOmitMode
;; http://stackoverflow.com/q/14850103
(require 'dired-x)
(setq-default dired-omit-files-p t) ; this is buffer-local variable
(setq dired-omit-files "^\\.[^.]\\|\\.pdf$\\|\\.meta$")
;; Search quickly in dired mode
;; http://stackoverflow.com/a/20617005/149008
(eval-after-load 'dired
  '(progn
    (define-key dired-mode-map (kbd "C-s") 'dired-isearch-filenames)
    (define-key dired-mode-map (kbd "C-M-s") 'dired-isearch-filenames-regexp)
))

;; Show file structure: "imenu-tree" command
;; http://www.emacswiki.org/emacs/TreeMode
(eval-after-load "tree-widget"
  '(if (boundp 'tree-widget-themes-load-path)
       (add-to-list 'tree-widget-themes-load-path "~/.emacs.d/")))
(autoload 'imenu-tree "imenu-tree" "Imenu tree" t)
(autoload 'tags-tree "tags-tree" "TAGS tree" t)

;; Show the directories in a tree structure: "dirtree" command
(autoload 'dirtree "dirtree" "Add directory to tree view" t)
(global-set-key "\C-o" 'dirtree-show)

;; C Sharp mode & omnisharp-mode
;; http://www.emacswiki.org/emacs/CSharpMode
;; https://github.com/sp3ctum/omnisharp-emacs
(require 'csharp-mode)
(add-hook 'csharp-mode-hook 'omnisharp-mode)

;; No tabs & Linux mode instead of the default GNU
;; http://www.emacswiki.org/emacs/IndentingC
(setq c-basic-offset 4)
(setq tab-width 4)
(setq indent-tabs-mode nil)
(setq-default indent-tabs-mode nil)
(setq c-default-style "linux" c-basic-offset 4)

;; SQL Editing mode
(require 'sql)
(autoload 'sql-mode "sql-mode" "SQL Editing Mode" t)
      (setq auto-mode-alist
         (append '(("\\.sql$" . sql-mode)
                   ("\\.proc$" . sql-mode)
                   ("\\.sp$"  . sql-mode))
                 auto-mode-alist))

;; cmake mode
;; http://www.cmake.org/Wiki/CMake/Editors/Emacs
; Add cmake listfile names to the mode list.
(setq auto-mode-alist
        (append
            '(("CMakeLists\\.txt\\'" . cmake-mode))
               '(("\\.cmake\\'" . cmake-mode))
                  auto-mode-alist))

(autoload 'cmake-mode "~/.emacs.d/cmake-mode.el" t)

;; Mouse scrolling for emacs. Requires MouseTerm - https://bitheap.org/mouseterm/
(unless window-system
  (xterm-mouse-mode 1)
  (global-set-key [mouse-4] '(lambda ()
                               (interactive)
                               (scroll-down 1)))
  (global-set-key [mouse-5] '(lambda ()
                               (interactive)
                               (scroll-up 1))))
(custom-set-variables
 ;; custom-set-variables was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 '(custom-safe-themes (quote ("dbf8cb30319aa88d14c569ef4509bd2c9ad6c8c58e7e7a7ae61a872cb32e9de2" default)))
 '(gud-gdb-command-name "gdb --annotate=1")
 '(large-file-warning-threshold nil)
 '(safe-local-variable-values (quote ((sh-basic-offset . 4) (sh-indent-comment . t)))))
(custom-set-faces
 ;; custom-set-faces was added by Custom.
 ;; If you edit it by hand, you could mess it up, so be careful.
 ;; Your init file should contain only one such instance.
 ;; If there is more than one, they won't work right.
 )
(put 'dired-find-alternate-file 'disabled nil)