This plugin allows you to quickly install a code editor on the WordPress install path, without any fuss, and you can remove it as quickly as you installed it. It is as simple as adding a plugin.
ICEcoder has many features, such as file backups on save which you can compare revision and restore at a click, important for on the fly changes that may break your site. ICEcoder can also be link to GitHub and to servers via FTP too.
ICEcoder is a MIT licenced free tool.