Need Equipment for your tortoise... Inka Products is the place to go.  They were brilliant recently when one of my Habistat Thermostats broke after a year.  It couldn't be fixed so they simply replaced it!

The Tortoise Protection Group is full of advice and support for keeprs and tortoises.

The Tortoise Trust, help with rehoming, husbandry and wild and captive torotise welfare.

The Tortoise House is a lovely website that gives lots of good husbandry ideas and has an extenisive list of safe plants, as does the Tortoise Table.