We have decided to make ICSx⁵ free and open-source software (FOSS) because we believe in the openness of the Internet and we want to be a counterpart to all the big companies who want to force their users to use proprietary standards.

iCalendar resources are more complex then they seem to be and development was (and still is) very hard work. So, although we offer ICSx⁵ for free, we highly appreciate your support and ask that you either buy it (see Download page) or donate to the project.

For donations, please use the channels listed on our DAVx⁵ donation page (just replace DAVx⁵ by ICSx⁵).