From Just Solve the File Format Problem
Cindex is software, developed by Indexing Research, for creating indexes to books, newspapers and other periodical publications.
- Cindex for DOS index files. *.NDX
- Cindex versions 1-2. *.CDX
- Cindex versions 3-4. *.UCDX
- Cindex templates have identical structure but have extensions *.TPL, *.UTPL