The Khipu Field Guide is a digital resource by researcher Ashok Khosla featuring schematic renderings and interactive analyses of over 700 Inkan khipus (knotted cord records from the 14th–16th centuries). The project includes a guidebook, searchable database, decipherment research, and scholarly resources to help users understand how the Inkas used knotted textiles to communicate and record information.
SF Title Alert is a service that monitors San Francisco property records and sends email notifications when new documents are recorded against a property, requiring users to input their block and lot numbers.