List of extant primary hadith collections asides the “6 books” :
The Seerah of Ibn Ishaq (d. 151)
al-Jami’ by Ma’mar b. Rashed (d. 153)
al-Muwatta’ by Malik b. Anas (d. 179 AH)
The Juz’ of Isma’il b. Ja’far (d. 180)
al-Zuhd by ‘Abdullah b. al-Mubarak (d. 181 AH)
al-Umm by al-Shafi’i (d. 204 AH)
al-Musannaf by Abdurrazzaq (d. 211 AH)
al-Musnad by al-Humaydi (d. 219 AH)
al-Sunan by Sa’id b. Mansur (d. 227 AH)
al-Musnad by Ali b. al-Ja’d (d. 230 AH)
al-Tabaqat Al-Kubra by Ibn Sa’d (d. 230)
al-Tarikh by Yahya b. Ma’in (d. 233 AH)
al-Musannaf by Ibn Abi Shaybah (d. 235 AH)
al-Musnad by Ishaq b. Rahuyah (d. 238 AH)
al-Musnad by Ahmed b. Hanbal (d. 241 AH)
al-Musnad by al-Darimi (d. 255 AH)
al-Tarikh al-Kabir by al-Bukhari (d. 256)
Musnad al-Tayalisi by Yunus b. Habib (d. 267 AH)
Tarikh Ibn Abi Khaythamah (d. 279)
The books of Ibn Abi al-Dunya (d. 281 AH)
al-Tarikh by Abu Zur’ah al-Dimashqi (d. 281 AH)
al-Musnad by al-Bazzar (d. 286 AH)
al-Sunan al-Kubra by al-Nasa’i (303 AH)
al-Musnad by Abu Ya’la (d. 307 AH)
al-Muntaqa by Ibn Al-Jarud (d. 307)
al-Tafsir by al-Tabari (d. 310 AH)
al-Tarikh by al-Tabari
Sahih Ibn Khuzaymah (d. 311 AH)
al-Mustakhraj by Abu ‘Awanah (d. 316 AH)
Sharh Mushkil al-Athaar by al-Tahawi (d. 321 AH)
al-Do’afaa al-Kabir by al-‘Uqaili (d. 322 AH)
al-Tafsir by Ibn Abi Hatem (d. 327 AH)
Sahih Ibn Hibban (d. 354 AH)
al-Mo’jam al-Kabir by al-Tabarani (d. 360)
al-Mo’jam al-Awsat by al-Tabarani
al-Mo’jam al-Saghir by al-Tabarani
Musnad al-Shamiyyeenn by al-Tabarani
al-Kamil by Ibn Adiyy (d. 365 AH)
Sunan al-Daraqutni (d. 385 AH)
al-Mustadrak by al-Hakim (d. 405 AH)
Sharh Usul al-I’tiqad by al-Lalaka’i (d. 418 AH)
Hilyat al-Awliyaa’ by Abu Nu’aim (d. 430 AH)
al-Mustakhraj by Abu Nu’aym
Dala’il al-Nubuwwah by Abu Nu’aym
al-Sunan al-Kubra by al-Bayhaqi (d. 458 AH)
al-Sunan al-Saghir by al-Bayhaqi 47. Dala’il al-Nubuwwah by al-Bayhaq
Tarikh Baghdad by Al-Khatib Al-Baghdadi (d. 463)