SendEmail is a lightweight, command line SMTP email client. If you have the need to send email from a command line, this free program is perfect: simple to use and feature rich. It was designed to be used in bash scripts, batch files, Perl programs and web sites, but is quite adaptable and will likely meet your requirements. SendEmail is written in Perl and is unique in that it requires NO MODULES. It has an intuitive and flexible set of command-line options, making it very easy to learn and use.

a Bash script that outputs any image in the terminal. Only dependence needed is imagemagick.

A common programming problem: identify the URLs in an arbitrary string of text, where by “arbitrary” let’s agree we mean something unstructured such as an email message or a tweet.

PyThumbnail is a Python script that uses Gecko (Firefox’s rendering engine) to generate a thumbnail of a web page. It is headless, meaning you can call it from the command-line or from another program and it doesn’t require a running X server.

Keep your plugins up-to-date! (semi-automatic retrieval) : vim online