xindy – A gen­eral-pur­pose in­dex pro­ces­sor

Xindy was de­celoped af­ter an im­passe had been en­coun­tered in the at­tempt to com­plete in­ter­na­tion­al­i­sa­tion of makein­dex.
Xindy can be used to pro­cess in­dexes for doc­u­ments marked up us­ing (La)TeX, Nroff fam­ily and SGML-based lan­guages. Xindy is highly con­fig­urable, both in markup terms and in terms of the col­lat­ing or­der of the text be­ing pro­cessed.