Vim is an excellent editor, and mastering it leads to more productivity. Even though is very extensible and allows to be configured by many plug-ins I rather keep it as simple as possible, trying not to use many plug-ins (neither packagers like Vundle, etc.).

However, I do make use of an extension that checks Python files for errors, PEP8, among other things: flake8. Because I do not use plug-in platforms for Vim, I install just this one manually, by making the command flake8 available system-wide¹.

Alpine is a software I definitely recommend for those who like minimalistic applications that go straight to the point in order to get the things done. It's an email client, with no GUI, which allows me to read emails better than by means of the web page¹ without any distractions, focusing on what is just important. It is also great that shows only the text (the relevant part of the email) and it can follow the links by launching the default browser.