+** undo-tree
+
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+
+ (use-package undo-tree
+ :ensure t
+ :config
+ (global-undo-tree-mode 1))
+
+#+END_SRC
+
+** swiper
+
+#+BEGIN_SRC emacs-lisp :tangle yes :results silent
+
+ (use-package swiper
+ :ensure t)
+
+
+ (ivy-mode 1)
+ (setq ivy-use-virtual-buffers t)
+ (global-set-key "\C-s" 'swiper)
+ (global-set-key (kbd "C-c C-r") 'ivy-resume)
+ (global-set-key (kbd "<f6>") 'ivy-resume)
+ ;; (global-set-key (kbd "M-x") 'counsel-M-x)
+ ;; (global-set-key (kbd "C-x C-f") 'counsel-find-file)
+ (global-set-key (kbd "<f1> f") 'counsel-describe-function)
+ (global-set-key (kbd "<f1> v") 'counsel-describe-variable)
+ (global-set-key (kbd "<f1> l") 'counsel-load-library)
+ (global-set-key (kbd "<f2> i") 'counsel-info-lookup-symbol)
+ (global-set-key (kbd "<f2> u") 'counsel-unicode-char)
+ (global-set-key (kbd "C-c g") 'counsel-git)
+ (global-set-key (kbd "C-c j") 'counsel-git-grep)
+ (global-set-key (kbd "C-c k") 'counsel-ag)
+ (global-set-key (kbd "C-x l") 'counsel-locate)
+ (global-set-key (kbd "C-S-o") 'counsel-rhythmbox)
+ ;; (define-key read-expression-map (kbd "C-r") 'counsel-expression-history)
+
+#+END_SRC
+