Download of Mongotron 1.0.0 for Mac was on the developer's website when we last checked. We cannot confirm if there is a free download of this app available. We recommend checking the downloaded files with any free antivirus. This free Mac application is an intellectual property of Tim Officer. The software is included in Developer Tools.
From the developer:
Mongotron is an open source, cross platform Mongo DB management tool, built using Electron and Angular JS. The program allows you to connect to your databases, create collections, list the content, run various commands and export the results to your local drive.
You may want to check out more software for Mac, such as WitangoStudio, DB Solo 3 or MySQLman, which might be related to Mongotron.