Bark Dialogue Editor
A Standalone dialogue editor (more accurately a JSON relational database editor) geared towards game development.
I've used a handful of dialogue editors in the past and I've found that they tend to be either too rigid in their structured output or they are flexible but don't have great UI/UX. I wanted to create a tool independent of any specific game engine where I could quickly define and save my own nodes to suit whatever project I'm working on.
The value the tool brings, for me, is the ability to construct and save your own schemas and groups of nodes in order to tailor the data structures to your project as opposed to the tool dictating how your project flows.