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T. Ogihara's Yet Another Software Last update: 2018.05.06

The original applications for macOS.
The original apps for iOS. Download via iTunes.


Handy Graphic is a graphic library which was developed for studying of C programming. You can freely use the package; library, header files, and an application for drawing on macOS.
The latest version is 0.6.5 (Mar. 2015).


Programming language Duskul is a pascal-like tiny language, which is developed for a programming exercise class (The web page is in Japanese).
The latest version is 0.1.1 (Apr. 2018).


Books (in Japanese)

“Programming Language Swift Definitive Guide”, 4th Ed. (Dec. 2017)

“Programming Language Objective-C 2.0 Definitive Guide”, 3rd Ed. (Dec. 2011)