Hello,
It's my honor to announce the release of Forage, a new simplified editor for Wikidata - which can also be used for other Wikibase installations, with some configuration changes. Like other tools, such as Cradle, Forage offers a more structured approach to editing than the standard Wikidata/Wikibase interface, though Forage does seem to have some advantages over previous tools in terms of ease-of-use. It is structured as a JavaScript user script, so all you have to do to install it is to add the following line to the /common.js subpage of your user page on Wikidata:
importScript('User:Techwizzie/forage.js');
Once you do that, you will see a new tab, "Add property values", on the page of any item on Wikidata; clicking on it will show a form for adding values, based on the "classes" (i.e., "instance of" values) of that item.
Note that Forage only lets you add data, not modify or remove existing data; this was a design decision we made to allow it to be a "safer" and more worry-free editing experience, especially for beginning editors.
Forage was created by Sanjay Thiyagarajan, Naresh Kumar Babu and myself, and started off as a project at the Wikimedia Hackathon in Estonia.
You can see more about Forage, including a lot of screenshots, at its GitHub page:
https://github.com/sanjay-thiyagarajan/forage
(You can also add translations there, for non-English languages - we look forward to those.)
We hope you try it out, and we welcome any feedback!
-Yaron