Download of Mixgram 17.1.7 for Mac was available from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Design & Photo Tools, more precisely Viewers & Editors. We recommend checking the downloaded files with any free antivirus. This free Mac application is a product of Mixgram.
From the developer:
Mixgram is a collage maker and photo collage editor. You have the ability to create unique collages, stories, wallpapers, and flyers. You can choose from hundreds of photo grids, stickers, fonts, and background patterns. Then, you can use creative tools to cut, draw, and customize your photo collage.
You may want to check out more Mac applications, such as JetPhoto Studio, EasyBatchPhoto or Hydra, which might be related to Mixgram.