Todoist - Todoist is a to-do list that helps you get organized, at work and in life.
Vtenext - Vtenext is a platform that allows you to tackle CRM processes and customers with great ease.
Gnome To Do - GNOME To Do is a simplistic personal task manager designed to perfectly fit the GNOME desktop.
Sales Creatio - Out-of-the-box processes to close more deals
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.
Teamgate CRM - Powerful CRM without the Salesforce Price tag.