Additional Oral Law classification systems?

Question

This question is a follow-up to the "no-form-for-the-oral-law" question.

These are the systems of organizing the total Oral Law (as opposed to Mitzvos Classification systems) that are known to me:

1. By weekly Parashah (like Midrash Rabbah), Posuk by Posuk, all sayings around that Posuk

2. The 6 Sdarim and the 60 (or more) Tractates - Mishnah by Misnah.

3. Rambam's 14 books of Mishnah Torah, based on the 613 Mitzvos but covering practically all the issues discussed in the Talmud.

4. Books covering the 613 Mitzvahs only (Chinuch, Sma"G)

5. Partial law - only potentially observable Halochos in these times: the 4 Turim and Shu"A and Kitzurey Shu"A

Are there additional systems of organizing the Halochos of the Oral Law? Are there any contemporary research or proposals?

Answer 1

R. Eliezer of Metz organized his Sefer Yereim under seven “pillars”:

1. Arayot
2. Food
3. Things prohibited to benefit from
4. Monetary prohibitions
5. Matters which harm other people but do not involve theft
6. Matters which affect only G-d
7. Matters which affect only G-d and are not dependent on speech

Answer 2

Rabbeinu Yona (Sha'arei Teshuva, gate 3) orders the commandments by severity of their punishment (מעלות חומר המצות ואזהרות וחלוק העונשים):

1. Rabbinical commandments
2. Positive commandments
3. Negative commandments that can be rectified by a positive commandment
4. Negative commandments not transgressed through an action
5. Negative commandments transgressed through an action
6. Commandments punished by death carried out by heaven
7. Commandments punished by being cut off (karet)
8. Commandments punished by death by a court
9. Commandments one is obligated to give up one's life not to transgress
10. Commandments punished by losing one's share in the World to Come