What companies are involved in HBAR?

Could you please enlighten me on the companies that are actively involved in the HBAR ecosystem? I'm particularly interested in understanding which organizations are leading the charge in this field and how they contribute to the overall development and growth of HBAR. Could you also provide insights into their roles, impact, and any potential collaborations they might have with other entities within the industry? It would be helpful to get a comprehensive overview of the key players in this exciting domain.