The Croatian Society for Open Systems and Internet (HrOpen) is a non-profit, member-driven association focused on open technologies and internet systems. It serves professionals, developers, and users in Croatia who work with or are interested in open standards, software, and infrastructure.

• Information Hub: Collects and disseminates technical information on open systems through its website, partner portals, and organized events.
• Member Networking: Connects individuals with shared interests to facilitate problem-solving and professional contacts within the community.
• Educational Events: Organizes conferences, seminars, and training with a neutral approach to improve skills in key technology areas.
• Advocacy and Support: Represents the common interests of its members to developers and manufacturers, proposing solutions based on user needs.
• Foundation Services: From its founding, has provided members with user accounts, email, disk space, and web access to build practical experience with open systems.