There are a few options. http://alternativeto.net/software/electron/ http://alternativeto.net/software/electron/ One thing about these is that Electron can be

There are a few options. http://alternativeto.net/software/electron/ http://alternativeto.net/software/electron/ One thing about these is that Electron can be optimized. I believe that one of the Visual Studio tools uses it and has dramatically lower memory than slack. Slack just doesn't try to improve performance.