Tarea is described as 'pro is an online to-do list and task manager for startups, small business and teams that don't want the overload of features and strict working methodologies of complex project management tools' and is an app in the Office & Productivity category. There are more than 100 alternatives to Tarea for a variety of platforms, including Online / Web-based, iPhone, Android, Windows and Mac. The best alternative is Trello, which is free. Other great apps like Tarea are Todoist (Freemium), Quire (Freemium), Asana (Freemium) and WorkFlowy (Freemium).
Glip is instant messaging for teams and businesses to communicate and get work done at the same time. In Glip you work where your conversations are, so you always know what your team is doing and what needs to get done next.
Redbooth (formerly Teambox), the cloud-based company redefining collaboration and business communications. Easily organize teams and projects to ensure visibility and accountability, enabling your team to get more accomplished.