Raygun - Raygun gives developers meaningful insights into problems affecting their applications. Discover issues - Understand the problem - Fix things faster.

Todoist - Todoist is a to-do list that helps you get organized, at work and in life.

Snare - Snare is well known historically as a leader in the event log space.

Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.

Sentry.io - From error tracking to performance monitoring, developers can see what actually matters, solve quicker, and learn continuously about their applications - from the frontend to the backend.

EssentialPIM - EssentialPIM is a free Personal Information Manager that keeps up with the times and lets you manage appointments, tasks, notes, contacts, password entries and email messages across multiple devices and cloud applications.