osTicket is a widely-used open source support ticket system $5/month
We offer the best feature on the market
osTicket is a widely-used open source support ticket system. It seamlessly integrates inquiries created via email and web-based forms into a simple easy to use multi-user web interface. Easily manage, organize and archive all your support requests and responses in one place while providing your clients with accountability and responsiveness they deserve. osTicket is an attractive alternative to higher-cost and complex customer support systems; simple, lightweight, reliable, open source, and easy to setup and use. The best part is, it's completely free.
osTicket is an open source trouble ticketing system that allows companies to track any type of issues so that they can be more efficiently fixed. As an open source system, it is 100% free to use, which makes it one of the most affordable options out there. The data for this system is stored on a MySQL database, and it runs via a web hosting server. It also requires PHP to be installed on the server to display the information to the end users.
This ticketing system can be used by multiple users from multiple locations since it is all web-based. This adds greater flexibility for companies using it. The makers of osTicket claims that they are the most popular customer support ticketing system, and this is likely true do to its widespread use, especially with small to mid-sized businesses.