There was a download of Ypsilon 0.9 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available. Ypsilon lies within Development Tools, more precisely IDE.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. The following version: 0.9 is the most frequently downloaded one by the program users. The program's installer file is generally known as Ypsilon.exe. This free program is an intellectual property of Y. Fujita / LittleWing.co.jp.
From the developer:
Ypsilon Scheme System has been developed as a fundamental technology for LittleWing Pinball Construction System. It is named after Yoshikatsu Fujita, the author of the program. It is distributed by BSD-like License.
The pinball game rules are described in C or C . Though they have great advantages in processing speed, there are some difficulties in development because C language stops the program immediately upon encountering an error.
You may want to check out more software, such as PBDoc UNICODE Including PB10.5 & PB9.0.2 VM, GpProfile or Developer Express Refactor! Pro, which might be related to Ypsilon.