Nemesys Software is developing software for the Apple Macintosh, running macOS and software for iPhone and iPads running iOS.

We've gained experience in developing software since 1990, initially in Pascal. For the past 19 years, we have been using object oriented programming with the Objective-C language, with the help of NEXTSTEP/OPENSTEP operating system, and with its most advanced development tools, and now with Apple's macOS operating system. More details can be found here. We’ve also leveraged our knowledge in OS X and Cocoa to tackle development of iOS applications as well. SL Notifier is our first iOS application on the App Store.

We have also developed and worked on a few software for the Newton platform, specifically the Apple MessagePad.