Currently I'm using TiddlyWiki (a local Single-File-HTML-Wiki) for storing my snippets. There I can add a description, tags and additional information like example usages or whatever I want. It's accessible from everywhere if you put it on OneDrive or Dropbox.
With the help of additional plugins, e.g. Highlight.js, we also get syntax highlighting.
It's very easy to use and has a lot of great extensions to offer. In my opionion the most important features are tags, to keep the things organized without the need of an hierarchical structure, and the great and very-fast-to-use in-text search, to search for keywords in your snippets.
That...is really cool.
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