All links of Freeware and Open Source

Freeware and Open Source related site:

• Association of Field Ornithologists

• Pacific Seabird Group (PSG)

• The Waterbird Society

• Bird Studies Canada

• Society of Canadian Ornithologists | Société des Ornithologistes du Canada

• Wilson Ornithological Society

• Latvian Ornithological Society

• California Bird Records Committee

• Western Field Ornithologists

• LIPU-UK