Trello is really great compared with your average todo list, Excel spreadsheet, or planning tool. Unless your needs are super complex or your list of tasks is longer than a few hundred items, I'd say start with Trello until you need something else. If you're in a domain where there's good planning tools or you're tracking a ton of items, e.g. issue tracking for software development, then it's worth doing a more detailed evaluation of alternatives for you.
Trello works really well for simple visual task management.
Everyone on your team can quickly see what’s happening in the project and what tasks need to be done.
It works really well for small teams with simple projects and tasks. But for large teams working on several projects, Trello can quickly become cluttered.
However, compared to Asana and Toggl Plan, Trello falls short at project planning and team management.
There’s no way to see the project timeline and keep track of milestones.
You also won’t be able to quickly see who’s available, who's working and who’s on vacation, making it difficult to manage team workloads.
Evernote - Bring your life's work together in one digital workspace. Evernote is the place to collect inspirational ideas, write meaningful words, and move your important projects forward.
Asana - Asana project management is an effort to re-imagine how we work together, through modern productivity software. Fast and versatile, Asana helps individuals and groups get more done.
Google Keep - Capture notes, share them with others, and access them from your computer, phone or tablet. Free with a Google account.
Wrike - Wrike is a flexible, scalable, and easy-to-use collaborative work management software that helps high-performance teams organize and accomplish their work. Try it now.
Simplenote - The simplest way to keep notes. Light, clean, and free. Simplenote is now available for iOS, Android, Mac, and the web.
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.