Todo.txt - Track your tasks and projects in a plain text file, todo.txt. A todo.
DeltaSalesApp - Field Sales Force Automation & Field Force Tracking Software
Task Coach - Task Coach is a simple open source todo manager to keep track of personal tasks and todo lists.
Smart Service - Smart Service's QuickBooks integration makes it the ultimate scheduling and dispatch software for HVAC, plumbing, pest control, and other service industries.
Strikethru - Strikethru is a kind of to-do list notebook for managing work lists and staying updated with the important tasks.
Service Cloud Field Service - Service Cloud Field Service is a cloud-based field service solution designed to initiate customer service activities from anywhere.