The Tosefta is a second compilation of oral law from the period of the Mishnah. In many ways, the Tosefta acts as a supplement to the Mishnah (tosefta means "supplement"). The Mishnah is the basic compilation of the Oral law of Judaism; it was compiled around 200 CE. It is a Halakhic work which corresponds in structure almost exactly to the Mishnah, with the same divisions for sedarim ("orders") and masekhot ("tractates"). It is mainly ...

Including:

• Tosefta - Orthodox scholars
• Tosefta - Non-Orthodox scholars
• Tosefta - External link

Read more here: » Tosefta: Encyclopedia - Tosefta

However, recent scholarship, especially by Professor Judith Hauptman reveals that the Tosefta draws on source material earlier than the later material in the Mishnah. It may well be that parts of the Tosefta predate the Mishnah. The Tosefta has been translated into English by Rabbi Jacob Neusner and his students. They have also produced a commentary. ...

See also:

Tosefta, Tosefta - Orthodox scholars, Tosefta - Non-Orthodox scholars, Tosefta - External link

Read more here: » Tosefta: Encyclopedia II - Tosefta - Non-Orthodox scholars