Savarez Selector
Between 1998 and 2000 Savarez shipped, on CD and on its website, an Excel workbook, selectorconve.xls, that computed diameters, tensions and catalogue references for its strings. This site documents it and replicates it with demonstrable fidelity.
Calculators
Plain strings
Tension ↔ diameter for KF, nylon, gut and steel, with the catalogue references.
Wound strings
Tension → linear weight (PUL) → references in the five wound-string families.
Instruments
The original's 31 instrument templates plus a custom instrument.