Quire

I've been using Quire on a daily basis for about a month now. It has proven to be an amazing tool for breaking down big tasks into smaller manageable bits, focusing on current task and, most importantly, reducing the feeling of overwhelm. It has all the features you'd expect from a decent task manager, like having unlimited number of tasks and task levels, setting task priority and due date, etc. But it also has a number of extra features that make Quire stand out:

• Clean interface. All you have in front of you is just the task tree (with optional task details panel) or Board view. The app was clearly designed with simplicity and efficiency in mind. And most of the extra features you might need are one click (or key stroke) away.

• Hotkeys. Super useful and very intuitive. You can add, delete, edit, move and navigate your tasks without touching your mouse\touchpad at all.

• Zoom. If you need to focus on one particular subtask, just select it and hit 'Z'. This will 'zoom' into you task tree making selected task the new root, hiding everything else. You can easily 'zoom out' to any higher level of the tree using breadcrumbs at the top of the screen. Absolutely indispensable tool for maintaining sanity and staying focused when your task list is disgustingly huge and terrifying.

• Markdown support. Sometimes task descriptions and comments can become quite big and messy, so having the power of Markdown to make things more structured and pretty is great. If you don't know Markdown, do yourself a favor and learn it. It's very simple, but extremely efficient way to format your texts.

• Board view. Basically it's a Kanban board with arbitrary number of columns (statuses) that you can fill with tasks from your task list. A very nice tool for planning, task prioritization and monitoring.

• It's free! For now, at least...

The gantt chart is locked behind their paywall, so there's really no point in using this program when others like todoist exist.