threat_note is a web application built by?Defense Point Security?to allow security researchers the ability to add and retrieve indicators related to their research. As of right now this includes the ability to add IP Addresses, Domains and Threat Actors, with more types being added in the future.
This app fills the gap between various solutions currently available, by being lightweight, easy-to-install, and by minimizing fluff and extraneous information that sometimes gets in the way of adding information. To create a new indicator, you only really need to supply the object itself (whether it be a Domain, IP or Threat Actor) and change the type accordingly, and boom! That's it! Of course, supplying more information is definitely helpful, but, it's not required.
Other applications built for storing indicators and research have some shortcomings that threat_note hopes to fix. Some common complaints with other apps are:
Hard to install/configure/maintain
Need to pay for added features (enterprise licenses)
Too much information
This boils down to there being so much stuff to do to create new indicators or trying to cram a ton of functions inside the app.