Hot answers tagged tosfot
Wikipedia's article "Tosafot", quoting the 1906 Jewish Encyclopedia's: The edited tosafot owe their existence particularly to Samson of Sens and to the following French tosafists of the thirteenth century: (1) Moses of Évreux, (2) Eliezer of Touques, and (3) Perez ben Elijah of Corbeil.
There is a sefer by Efraim Urbach called "Ba'alei HaTosafot" (in Hebrew) that discusses them and analyzes, Masechta by Masechta, who the anonymous authors might be.
Malbim (to Lev. 4:2, sec. 191) argues for your option 1c: there are derashos in Sifra for all three of the cases that Tosafos mentions - being a zav/zavah, pledging erachin and performing semichah - that converts are included. He explains at some length that indeed "bnei Yisrael" includes only born Jews. So mitzvos fall into several categories: Those ...
The Yam Shel Sh'lomo is the one who, disagreeing with Tosafos, distinguishes between adults and children playing ball on Yom Tov http://hebrewbooks.org/pdfpager.aspx?req=14086&st=&pgnum=22&hilite=: אלא שחוק של ילדים שלא הגיעו לכלל חיוב הנח The YS"S can arguably be interpreted to refer to children below the age of chinuch. There is a Tosafos ...
According to this page, the author is unknown. However, earlier in the book (fn. 2), he says that it was first printed in Livorno 5543, if that helps you.
חגיגה כא ע''א, מנחות כב ע''ב זבחים עא ע''א, יומא נו ע''א,נזיר לו ע''ב all have enormous תוספות.
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