Not open source but Free: Micro-Cap 12 https://web.archive.org/web/20230219052113/http://www.spectrum-soft.com/index.shtm https://web.archive.org/web/2023021905

Not open source but Free: Micro-Cap 12 https://web.archive.org/web/20230219052113/http://www.spectrum-soft.com/index.shtm https://web.archive.org/web/20230219052113/http://www.spectr...