Some free tools you can use to start your business. The providers normally provide the free tools for basic usage. Some limitation on features and users. But if you are small, it doesn’t matter much. At least you can start with some cool softwares to support your small business

CRM – hubspot

Support Ticket/ Help Desk – freshdesk

Accounting – waveapps – need to pay to use payroll and payments

Version control – GitLab