We develop and sell specialist hard- and software tools for tree inspection and arboriculture. Besides the specialist software Arbostat (for the evaluation of pulling tests), rootcalc (for quantifying loss in root zone area) and Rigging 1.0 (educational software for forces generated in rigging operations) we recently published TreeCalc, a browser independent online application for the assessment of safety factors against stem fracture in storm events. Check www.treecalc.com !