Taskade - Make lists, organize your thoughts, and be inspired to get things done. Taskade is a collaborative space for your tasks.

Makerlog - Makerlog is the dead-simple task log that helps you stay productive and ship faster.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

WIP.co - Work in progress. We are a community of makers who help each other ship product.

The ToDon't List - A to-do list for avoiding the things you shouldn't be doing

Indie Hackers - Connect with fellow entrepreneurs, developers, and bootstrappers who are sharing the strategies and revenue numbers behind their companies.