i've found these last days a handful of really useful little emacs packages:
smartscan, a simple way of navigating programming modes
(use-package smartscan :ensure t :commands smartscan-mode :init (add-hook 'prog-mode-hook #'smartscan-mode) :diminish)
git-link, because i almost never look at files using the browser, but some people don't have my repos checked out. Specially nice the bit about being able to use git config variables.
(use-package git-link :ensure t :custom ((git-link-default-remote "bigml")))
visible-mode, an Emacs built-in, especially useful in org buffers, where i hide markup and sometimes it's a chore to ascertain whether point is before or after a it. With a binding to this minor mode, it's a breeze to toggle them:
(use-package visible-mode :bind (("s-v" . visible-mode)))
Tip of the hat to Daniel Mai, for a couple of the above. You might find some other interesting tidbits in his config.