diff --git a/core/prelude-core.el b/core/prelude-core.el
index 7ce5060..fa630b3 100644
--- a/core/prelude-core.el
+++ b/core/prelude-core.el
@@ -71,21 +71,17 @@ PROMPT sets the `read-string prompt."
                 (buffer-substring (region-beginning) (region-end))
               (read-string prompt))))))
 
-(defun prelude-google ()
-  "Googles a query or region if any."
-  (interactive)
-  (prelude-search "http://www.google.com/search?q=" "Google: "))
+(defmacro prelude-install-search-engine (search-engine-name search-engine-url search-engine-prompt)
+  "Given some information regarding a search engine, install the interactive command to search through them"
+  `(defun ,(intern (format "prelude-%s" search-engine-name)) ()
+       ,(format "Search %s with a query or region if any." search-engine-name)
+       (interactive)
+       (prelude-search ,search-engine-url ,search-engine-prompt)))
 
-(defun prelude-youtube ()
-  "Search YouTube with a query or region if any."
-  (interactive)
-  (prelude-search "http://www.youtube.com/results?search_query="
-                  "Search YouTube: "))
-
-(defun prelude-github ()
-  "Search GitHub with a query or region if any."
-  (interactive)
-  (prelude-search "https://github.com/search?q=" "Search GitHub: "))
+(prelude-install-search-engine "google"     "http://www.google.com/search?q="              "Google: ")
+(prelude-install-search-engine "youtube"    "http://www.youtube.com/results?search_query=" "Search YouTube: ")
+(prelude-install-search-engine "github"     "https://github.com/search?q="                 "Search GitHub: ")
+(prelude-install-search-engine "duckduckgo" "https://duckduckgo.com/?t=lm&q="              "Search DuckDuckGo: ")
 
 (defun prelude-indent-rigidly-and-copy-to-clipboard (begin end arg)
   "Indent region between BEGIN and END by ARG columns and copy to clipboard."
@@ -405,6 +401,7 @@ Doesn't mess with special buffers."
     "Press <C-c g> to search in Google."
     "Press <C-c G> to search in GitHub."
     "Press <C-c y> to search in YouTube."
+    "Press <C-c U> to search in DuckDuckGo."
     "Press <C-c r> to rename the current buffer and file it's visiting."
     "Press <C-c t> to open a terminal in Emacs."
     "Press <C-c k> to kill all the buffers, but the active one."
diff --git a/core/prelude-mode.el b/core/prelude-mode.el
index 2258c0a..bd7a2ff 100644
--- a/core/prelude-mode.el
+++ b/core/prelude-mode.el
@@ -39,6 +39,7 @@
     (define-key map (kbd "C-c g") 'prelude-google)
     (define-key map (kbd "C-c G") 'prelude-github)
     (define-key map (kbd "C-c y") 'prelude-youtube)
+    (define-key map (kbd "C-c U") 'prelude-duckduckgo)
     ;; mimic popular IDEs binding, note that it doesn't work in a terminal session
     (define-key map [(shift return)] 'prelude-smart-open-line)
     (define-key map (kbd "M-o") 'prelude-smart-open-line)
diff --git a/modules/prelude-coffee.el b/modules/prelude-coffee.el
index 69e3c65..90d881d 100644
--- a/modules/prelude-coffee.el
+++ b/modules/prelude-coffee.el
@@ -40,7 +40,7 @@
        "coffee-mode-defaults"
 
        ;; CoffeeScript uses two spaces.
-       (set (make-local-variable 'tab-width) 2)
+       (setq coffee-tab-width 2)
 
        ;; If you don't have js2-mode
        (setq coffee-js-mode 'javascript-mode)
diff --git a/modules/prelude-latex.el b/modules/prelude-latex.el
index 9d8ec70..c4a9ba0 100644
--- a/modules/prelude-latex.el
+++ b/modules/prelude-latex.el
@@ -44,17 +44,17 @@
 ;; use pdflatex
 (setq TeX-PDF-mode t)
 
-(setq TeX-view-program-selection
-      '((output-dvi "DVI Viewer")
-        (output-pdf "PDF Viewer")
-        (output-html "HTML Viewer")))
+;; sensible defaults for OS X, other OSes should be covered out-of-the-box
+(when (eq system-type 'darwin)
+  (setq TeX-view-program-selection
+        '((output-dvi "DVI Viewer")
+          (output-pdf "PDF Viewer")
+          (output-html "HTML Viewer")))
 
-;; this section is good for OS X only
-;; TODO add sensible defaults for Linux/Windows
-(setq TeX-view-program-list
-      '(("DVI Viewer" "open %o")
-        ("PDF Viewer" "open %o")
-        ("HTML Viewer" "open %o")))
+  (setq TeX-view-program-list
+        '(("DVI Viewer" "open %o")
+          ("PDF Viewer" "open %o")
+          ("HTML Viewer" "open %o"))))
 
 (defun prelude-latex-mode-defaults ()
   (turn-on-auto-fill)
diff --git a/modules/prelude-ruby.el b/modules/prelude-ruby.el
index 59cb841..e5792fb 100644
--- a/modules/prelude-ruby.el
+++ b/modules/prelude-ruby.el
@@ -48,6 +48,7 @@
 (add-to-list 'auto-mode-alist '("Thorfile\\'" . ruby-mode))
 (add-to-list 'auto-mode-alist '("Vagrantfile\\'" . ruby-mode))
 (add-to-list 'auto-mode-alist '("\\.jbuilder\\'" . ruby-mode))
+(add-to-list 'auto-mode-alist '("Podfile\\'" . ruby-mode))
 
 ;; We never want to edit Rubinius bytecode
 (add-to-list 'completion-ignored-extensions ".rbc")
diff --git a/modules/prelude-web.el b/modules/prelude-web.el
index 234804e..0a0062b 100644
--- a/modules/prelude-web.el
+++ b/modules/prelude-web.el
@@ -49,8 +49,6 @@
 (eval-after-load 'web-mode
   '(progn
      (defun prelude-web-mode-defaults ()
-       ;; Disable whitespace-mode when using web-mode
-       (whitespace-mode -1)
        ;; Customizations
        (setq web-mode-markup-indent-offset 4)
        (setq web-mode-css-indent-offset 2)