Ranked in these QuestionsQuestion Ranking
Pro Supports Markdown
Pro Sync snippets through Dropbox
Sync through iCloud.
Pro Alfred Integration
Makes for extremely fast pasting of code snippets and SQL queries.
Pro Simple and good UI
Nothing extra fancy, does what it needs to do
Pro Great Language Support
Supports almost every language that you can think of.
Pro Option to add your own Markdown stylesheet.
Pro Compact UI
Nice UI options that let you hide certain things, go compact, hide notes and tags etc.
Con Lacking support for other platforms
Con No support for placeholders in snippets
Con You cannot create Tag Groups
Tag Groups enhance usability once a lot of tags have been collected
Con Closed source
Con No gist batch support
Con Bad gist import
Gist import data isn't adaptable. So the imported snippets could get named very ugly.
Con Can not sync Snippets across different machines
You can do this now.