diff --git a/modules/editing.el b/modules/editing.el
index 407b292..dfb2081 100644
--- a/modules/editing.el
+++ b/modules/editing.el
@@ -157,6 +157,22 @@
      try-complete-lisp-symbol) ;; Complete as Elisp symbol.
    )
 
+  ;; --------------------------------------------------------------------------
+  ;; Check spelling.
+  ;; --------------------------------------------------------------------------
+
+  (use-package flyspell
+    :init
+    (add-hook 'text-mode-hook 'flyspell-mode)
+    (add-hook 'org-mode-hook 'flyspell-mode)
+    (add-hook 'prog-mode-hook 'flyspell-prog-mode)
+    :config
+    (if (executable-find "aspell")
+        (progn
+          (setq-default ispell-program-name "aspell")
+          (setq-default ispell-extra-args '("--sug-mode=ultra")))
+      (setq-default ispell-program-name "ispell")))
+
   ;; --------------------------------------------------------------------------
   ;; Commands.
   ;; --------------------------------------------------------------------------
diff --git a/modules/programming.el b/modules/programming.el
index a4df50c..033888f 100644
--- a/modules/programming.el
+++ b/modules/programming.el
@@ -45,6 +45,15 @@
     :init
     (yas-global-mode 1))
 
+  ;; --------------------------------------------------------------------------
+  ;; Debugging options.
+  ;; --------------------------------------------------------------------------
+
+  (use-package gud
+    :defer t
+    :config
+    (setq gud-chdir-before-run nil))
+
   ;; --------------------------------------------------------------------------
   ;; Line numbers.
   ;;