When comparing FoldingText vs Gingko, the Slant community recommends Gingko for most people. In the question“What are the best Markdown editors for OS X?” Gingko is ranked 28th while FoldingText is ranked 36th.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Supports custom CSS
Pro Extensible with plugins and scripts
Pro Built-in productivity features
It has a foldable outline (like the name says), task checklists, and tags.
Pro You can customize colors
Pro Allows focusing on one piece of information at a time
Since Gingko documents are "trees", they are always organized on the go. And since everything is written in cards, it is possible to focus on one chunk of content at a time.
Pro Easy to overview
Despite the complexity of the tree structure, it's always clear where you are, and how to quickly add your thoughts.
Pro Markdown support
All formatting is done via Markdown.
Pro Non-linear
Non-linear notetaking allows you more flexibility, freedom and creativity.
Cons
Con Limited free version
The free version is limited to 100 cards and 10 documents. Depending on how you use it, this might not be enough.