TAD (The Architect's Desktop)

TAD (The Architect's Desktop) is a free software tailored for Building Information Modelling (BIM) specifically aimed at architects, setting itself apart from conventional systems by focusing on architectural design rather than engineering aspects. Developed from a small architect's office in India since 1989, TAD facilitates efficient design workflows from the initial stages of conceptual design, like bubble-diagramming, to detailed area calculations and quantity extractions throughout the design process.
The software is notable for its small file sizes and vast querying capabilities, allowing architects to iterate designs and receive feedback instantly. TAD includes ARDELA, a built-in language that enables users to create custom add-ons (probes) for enhanced functionality. This characteristic not only supports traditional architectural practices but also accommodates unconventional designs, particularly beneficial for architects in developing regions.
Moreover, TAD has been instrumental in over 3 million built projects over the past 30 years, underlining its effectiveness and contribution to the architectural community.
As of version 7.0, TAD is transitioning to an open-source model, emphasizing community support and privacy. Users must join the teamTAD community on Discord for access to the full version, which strengthens the collaborative spirit among architects using the software.