There’s a new web app called 2dooo Things which is a direct ripoff of Cultured Code’s wonderful Things task management application. In fact their home page shows a screenshot of the actual Things app.
If you actually sign in, you’ll see that the main screen is identical to things on the Mac. For some strange reason, a new account gets 6 items in the trash.
Things desktop app
2dooo Things web app
If Cultured Code isn’t involved with this and didn’t explicitly give them permission to copy Things, they should take action against 2dooo.