Ask HN: What are you using to keep your technical notes?

I have several different pieces of software I use for note taking, but each one has its upsides and downsides, none seem to be perfect. The kind of notes I'm mainly after storing are learning notes. For example when I did my Red Hat course, I used Evernote. Evernote is really good, styling is easy, it looks great, I can share it, putting pictures in (big points) is easy - but one of the major drawbacks is it's a pain to insert code blocks. I use Markdown for more code-oriented notes, but putting images in to Markdown is a pain and it's just a format, not a service (whereas Evernote syncs to all my devices etc). Just thought I would see what the HN community uses. I'm currently learning Puppet and taking lots of notes, I started with Evernote but then realised I wanted to insert lots of code blocks, so I swapped to Markdown and now realise I want easy inline images and the ability to share to all of my devices without having to do something bespoke or use Dropbox/G drive etc.