The cosmology calculator WELTTABELLEN (literally: WORLDTABLES) provides worldlines of galaxies and photons in tabular form for the spatially flat standard model of cosmology (Lambda-CDM model). In addition, Hubble radius, light cones for arbitrary apexes, event horizon and particle horizon are calculated as a function of user-defined coordinate ranges. Furthermore, various cosmological parameters, intersections between light cones, Hubble sphere, horizons and worldlines of galaxies as well as the recession velocities of galaxies, Hubble sphere, light cones and horizons can be determined. Light emitted from galaxies at a specific point in time can be assigned to those light cone apexes at which the emitted light is visible. All result values can be provided depending on scale factor, redshift, and time after the Big Bang, and can be displayed in comoving and physical coordinates. WELTTABELLEN traces the essential characteristics of the Lambda-CDM model. The program may be used by professionals (e.g. lecturers and students at the university) and lay people interested in cosmology. To the author's knowledge, no free comparable software is available on the market. The performance range of the program exceeds by far the capabilities of the online cosmology calculators that can be found on the internet. In addition to outputting standard tables, the program is capable of writing a large number of variables to a so-called plotter data file. The term plotter data file is based on the initial intended use, namely the preparation of drawings. In principle, however, this file type can be used for all applications for processing cosmological data. The current WELTTABELLEN file system, consisting of several folders and centered around the executable WELTTABELLEN program, can be downloaded for free from the website https://www.welttabellen.com/ as a ZIP file, along with the current program description and installation instructions. The website also contains definitions of terms, various useful supplementary documents, application tips, and numerous examples of control files and corresponding result printouts. The offline program does not provide a graphical user interface. There are no English versions of program printouts and program description. However, the website contains some basic information in English and Spanish.