add-on > addon ( stick with one spelling )
* File extension: <code>.tex</code>
* Helper (file viewer) application: see the [[Addon:GenealogyTree#Prerequisites|Prerequisites]] section for the GenealogyTree
"Lamport's TeX" is named after developer [https://wikipedia.org/wiki/Leslie_Lamport Leslie Lamport]. With LaTeX, Lamport added a collection of macros to the original T<sub>E</sub>X program which was made by [https://wikipedia.org/wiki/Donald_Knuth Donald Knuth].