With PlanHammer you can quickly jot down tasks before you forget and come back later to re-arrange them in structured list, then add details such as files, checklists, dependencies, and risks, then assign out the tasks to your co-workers and communicate with mentions and comments. Get a high level overview of the effort required to achieve your objective in the work breakdown structure, which easily expands and collapses, and allows task assignment and detail updates without changing context. GANTT view shows when things are coming due and their pre-requisites so schedules stay up to date.
Agile kanban boards make assigning tasks to team members and keeping track of work in progress and prioritization easy and tightly integrated into the rest of the project. In the RACI area anyone on the team can quickly see who must be kept in the loop for each task. The risk register contains all of the project's risks and provides an easy to use repository of mitigation and contingency plans so you're always prepared. Invite your co-workers in the project settings (or on the projects list page) so that your project can get in the groove and begin to self organize.