SkillMentor - Acquire skills from self-help books
Trello - Infinitely flexible. Incredibly easy to use. Great mobile apps. It's free. Trello keeps track of everything, from the big picture to the minute details.
Growth Haus - Grow your pipeline - streamline workload
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.
Amie - GitHub for research and data science
Basecamp - A simple and elegant project management system.