vim

If you spend a lot of time typing plain text, writing programs or HTML, you can save much of that time by using a good editor and using it effectively. This paper will present guidelines and hints for doing your work more quickly and with fewer mistakes...

Right of out the box, vim isn’t as suited to editing Python code as it could be. In fact, it’s rather annoying to write Python code with an uncustomized instance of vim. What follows is a description of how to put into place the most essential features of the editor one chooses to write code, especially Python code, in as manifested with vim. With the following changes, you can create a highly customized and powerful IDE, allowing you to increase your productivity without purchasing a commercial offering...

Write BASH-scripts by inserting comments, statements, tests, variables, builtins, etc..
Speed up writing new scripts considerably. Write code and comments with a professional appearance from the beginning....