Hey everyone, i've made a tool that allows you to query Wikidata in a visual way without using SPARQL. It's called VizQuery:
http://tools.wmflabs.org/hay/vizquery/
The possibilities of using Wikidata to do interesting queries are endless, and the current query service allows for very powerful queries indeed. However, i feel that for the general public, especially those who are not that technical, it might be a bit overwhelming and difficult for them to learn a complex language such as SPARQL. To make people familiar with the concept of queries i believe a somewhat less intimidating approach might be useful, hence this tool.
VizQuery is only capable of doing a subset of possible queries. It's basically simple triples, variables (prefixed with '?') and literals (between "quotes"). You can do pretty powerful queries with only those things though. For example, here's a query with vegetarians who are married to a vegetarian:
Under the hood VizQuery uses Ruben Verborgh's SPARQL.js library to convert between JSON and SPARQL, so theoretically every SPARQL query you could do in the regular query service can be done in VizQuery. However, many queries won't work because the visual interface only supports a subset of options: it's pretty hard to create user-friendly GUI representations of many of the complex SPARQL features. :)
Anyway, i'd like to hear what you think. Bugs, feature request and pull requests are also welcome on my Github page: https://github.com/hay/wiki-tools
Kind regards, -- Hay