Today, I discovered a new tool which is very similar to Jira and Trello. I feel Jira is designed mostly for complex projects but can be a bit overkill for smaller/personal projects. Trello is very simple and straightforward to use, however, it lacks the ability to scale as the project unfolds. From a brief look at is very similar to Trello in this regard, simple but lacks scalability. Its design is what differentiates from the other two well-known applications. If you want a more visual looking project tracking tool, I recommend giving a try.