Control 4 has the Composer HE (Home Edition) which allows you to do some programming, but doesn't allow for installing new devices onto the system - maybe that's what you are thinking about? I think Crestron has something similar.
A few years ago Savant launched a DIY remote - I believe it was creatively called the "Savant Remote" which was basically their version of a Harmony Elite (Touchscreen RF remote to a hub which only communicated with devices over IR). It was by all accounts a disaster and they pulled it from the market.
I stand to be corrected, but in the professional grade HA world the only system I know of that officially offers (almost) the same level of access to DIYer is Lutron Radio Ra2, and of course that's just lighting and HVAC controls.
A few years ago Savant launched a DIY remote - I believe it was creatively called the "Savant Remote" which was basically their version of a Harmony Elite (Touchscreen RF remote to a hub which only communicated with devices over IR). It was by all accounts a disaster and they pulled it from the market.
I stand to be corrected, but in the professional grade HA world the only system I know of that officially offers (almost) the same level of access to DIYer is Lutron Radio Ra2, and of course that's just lighting and HVAC controls.