Depending on the sophistication of the software, you can manage estimation and planning, scheduling, cost control and budget management, resource allocation, communication, decision-making, quality management and documentation or administration systems with planning software. Planning software can be used as a tool to effectively plan any projects that you have, whether they are large or small.
These companies in this category offer their Planning software under the SaaS (Software as a Service) model giving the flexibility and the ability to work from anywhere.
If you are looking for categories of software that are similar to Planning Software then Project Collaboration and Project Management Software will be of use to you.