Comana, COmputation MANAger, is a software to provide a framework of managing scientific computing. Researchers on computing have to check calculation and generate new calculation and execute, repeatedly. The abstract class that this gem provide would help the work.

This gem provide a site analysis for crystal cell.

This gem provides Cell, LatticeAxes, Atom classes, and so on. And this provides simple treatment of a periodic boundary condition.

Checking process is composed of two steps; file size and checksum hash. Not using diff command. User can stop the first step by indicationg an option.

This library provide common dealing to rename many files with safe method. Automatically mkdir if need and rmdir when empty.

This Gem provides functionality similar to the Trash box in Windows OS. The name 'gomiko' was originated from Japanese "gomibako". If you think that it is "a shrine maiden(miko-san) who plays go", is it cute? Gomiko provides the gomiko command; it moves the file to ~/.trash with a change of rm. And the command also can display the history of deletion and can execute undo. Gomiko provides the Gomiko library. It is designed so that the trash box can be handled from the Ruby program as well.

Markdown to HTML with table of contents, sidebar to neighboring directories.

MAth GEOmetry library to deal with 2 and 3 dimensional spaces. Cartesian and internal coordinate systems can be used. This includes besic objects in 3 dimensional space.

Mathematical library to deal with basic problems in algebla.

This gem privide framework for quiz game. This gem can be used for spaced repetition study. The more frequently mistaken problems are given more frequently.

This GEM provide tabmani command, which help you manipulate table with text format.

This gem provides a framework of text filter. Tefil eneable to make text filter commands which have overwrite option easily.

This gem provides parsers for some of input and output files for VASP. This will provide support command for computations.