PracticePanther - PracticePanther offers CRM, invoicing, time tracking and communication solutions for law firms.
Jira - The #1 software development tool used by agile teams. Jira Software is built for every member of your software team to plan, track, and release great software.
Clio - Clio provides a full suite of web-based practice management tools targeted specifically at the administrative needs of sole practitioners and small firms.
Basecamp - A simple and elegant project management system.
MyCase - Practice More, Manage Less.
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.