diff --git a/init.el b/init.el
index 724d67f..a2d4361 100644
--- a/init.el
+++ b/init.el
@@ -15,12 +15,13 @@
 (require 'oxa/org)
 (require 'oxa/latex)
 
+(require 'oxa/mail)
+
 ;;; theme
 (setq modus-themes-italic-constructs t
       modus-themes-bold-constructs t)
 
 (load-theme 'modus-operandi)
-(global-display-line-numbers-mode)
 (setq-default indicate-empty-lines t)
 (setq-default show-trailing-whitespace t)
 (add-hook 'prog-mode-hook #'(lambda () (whitespace-mode t)))
@@ -142,7 +143,7 @@
 
 (setq c-default-style '((java-mode . "java")
                         (awk-mode . "awk")
-                        (c-mode . "llvm.org")
+                        (c-mode . "linux")
                         (c++-mode . "llvm.org")
                         (other . "stroustrup")))
 
@@ -158,8 +159,21 @@
 ;; nya-nya-nya-nya-nya-nya
 (straight-use-package 'nyan-mode)
 (require 'nyan-mode)
+(setq nyan-animate-nyancat t
+      nyan-wavy-trail t)
 (nyan-mode 1)
 
+;; ess
+(straight-use-package 'ess)
+
+;; faster window switch
+(global-set-key (kbd "C-;") #'other-window)
+
+(straight-use-package 'dired-sidebar)
+(setq dired-sidebar-theme 'ascii)
+(define-key 'oxamap (kbd "t") 'dired-sidebar-toggle-sidebar)
+
+
 ;; I use custom vars for local config, so let's put them to separate
 ;; file, where it's easier for git to ignore it
 (setq custom-file "~/.emacs.d/custom.el")
diff --git a/lisp/oxa/lsp.el b/lisp/oxa/lsp.el
new file mode 100644
index 0000000..e69de29
diff --git a/lisp/oxa/mail.el b/lisp/oxa/mail.el
new file mode 100644
index 0000000..2834ff8
--- /dev/null
+++ b/lisp/oxa/mail.el
@@ -0,0 +1,40 @@
+(require 'mu4e)
+
+(setq mu4e-change-filenames-when-moving t)
+(setq mu4e-maildir "~/mail")
+
+(setq mu4e-update-interval (* 11 60))
+
+(setq mu4e-contexts
+(list
+       (make-mu4e-context
+        :name "oxapentane.com"
+        :match-func (lambda (msg)
+                      (when msg
+                        (string-prefix-p "/grigory@shipunov.xyz" (mu4e-message-field msg :maildir))))
+        :vars '((user-mail-address      . "grigory@shipunov.xyz")
+                (user-full-name         . "Grisha Shipunov")
+                (mu4e-drafts-folder     . "/grigory@shipunov.xyz/Drafts")
+                (mu4e-sent-folder       . "/grigory@shipunov.xyz/Sent")
+                (mu4e-trash-folder      . "/grigory@shipunov.xyz/Trash")
+                (mu4e-refile-folder     . "/grigory@shipunov.xyz/Archive")
+                (mu4e-maildir-shortcuts . (("/grigory@shipunov.xyz/INBOX"    . "?i")
+                                           ("/grigory@shipunov.xyz/Drafts"   . "?d")
+                                           ("/grigory@shipunov.xyz/Sent"     . "?s")))))
+       (make-mu4e-context
+        :name "oxapentane.com"
+        :match-func (lambda (msg)
+                      (when msg
+                        (string-prefix-p "/mail@oxapentane.com" (mu4e-message-field msg :maildir))))
+        :vars '((user-mail-address      . "mail@oxapentane.com")
+                (user-full-name         . "Grisha Shipunov")
+                (mu4e-drafts-folder     . "/mail@oxapentane.com/Drafts")
+                (mu4e-sent-folder       . "/mail@oxapentane.com/Sent")
+                (mu4e-trash-folder      . "/mail@oxapentane.com/Trash")
+                (mu4e-refile-folder     . "/mail@oxapentane.com/Archive")
+                (mu4e-maildir-shortcuts . (("/mail@oxapentane.com/INBOX"    . "?i")
+                                           ("/mail@oxapentane.com/Drafts"   . "?d")
+                                           ("/mail@oxapentane.com/Sent"     . "?s")
+                                           ("/mail@oxapentane.com/sinkhole" . "?S")))))))
+
+(provide 'oxa/mail)