Office 2010 Starter is a low end edition of Microsoft Office, which was exclusively available as a preinstalled version on new computers in a number of countries. The download links on the Microsoft servers for Office 2010 Starter leaked a couple of times in the past, but are currently unavailable.
Office 2010 Starter contains Word 2010 and Excel 2010 only. These versions however are unrestricted. It's a full product, and no limited trial version. Unfortunately, the free downloads are no longer available. Should they ever come back, we'll let you know about it right here.
Office Online (formerly "Office Web Apps") is a free browser based version of Microsoft Office 2016, and the official successor of Office Starter. Standalone versions of Office 2016 are available through Amazon: