HeySpace - HeySpace is the only free task and simple project management software with communication and collaboration feature.
GitHub Team Discussions - Now there's more space to talk through your projects 💬
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Schnack - Schnack is an open source commenting system written in JavaScript.
Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.
Product Hunt Reviews Widget - Embed and encourage PH reviews into your product