Boardly - A minimalistic planning board for your projects
Happy Tools by Automattic - A scheduling tool built for distributed teams
Corrello - Dashboards for agile teams using Trello
Talllly - A team to-do list that keeps score.
Planyway - Visual project management for Jira and Trello: manage resources, build project roadmaps, use time tracking.
Checklist Generator - Create checklists for free and host them wherever you want.