Check off system is what you can use in order to keep track of accomplished work or for registering people/items. Actually it stands for checklist management because it is the simplest way to hide done tasks or to register items/people. That system can be successfully used in any kind of technical work, HR or educational practice (for example tracking of attendance), quality management, project management etc. The program allows you to design and manage any kind of long-term/short-term to-do lists.

Check off software will make your to-do/checklists manageable and easy-to-use. Checklists managed with a help of that application are flexible and customizable. For example your task management system can provide you with adjustable level of details - for example: if you have a checklist of products to be bought in the nearest shop you need just a simple list with names of items, and if you deal with the project task list you need a real worksheet with multiple columns that represent faceted character of each task (time and cost parameters, priorities, assignments etc). It is advisable for you to choose and apply in practice proper program as it can be extremely useful as a main or auxiliary tool for personal/business project management. Let's consider specific examples of check off software :

VIP Organizer is a system designed for personal task and time management. With a help of this easy-to-use application with elegant interface you can design plan of small/medium project, organize activities, categorize and prioritize personal tasks, organize agenda in terms of time and tasks completion.
VIP Task Manager is a powerful client-server professional system for projects, with convenient and flexible interface. This efficient teamwork software can be used for corporate planning, scheduling and controlling of projects in terms of tasks completion, time and costs, sharing project/tasks calendar and evolution among multiple performers/stakeholders.