As a non-profit organization, The NetBSD Project is an organization which relies on the valuable contributions of both individuals and other organizations.
Contributions to NetBSD include money, hardware to support new platforms and peripherals, rack space to support critical project services and more.
In addition, some organizations and individuals contribute money and staff for promotional events such as trade shows. Some trade show organizers also provide free or low-cost space.
The easiest way to donate is of course monetarily. For other ideas, read more about how an organization or individual can contribute.