Here are links to collections of background material (in Hebrew) for advanced daf yomi learners. Suggestions and feedback solicited (mplaut at netvision dot net dot il or the mailto link below). The material mostly comes from Hebrewbooks.org
Besides the gemoras the most popular downloads have been Beiurei HaDaf part 1 on Chulin, Eizehu Mekomon on Menochos, Asifas Zekeinim on Zevochim, Ran on Chulin, Beiurei HaDaf part 3 on Chulin and Peirush Chai on Shabbos and Eiruvin.
Contact: Mordecai Plaut. Please send feedback and suggestions.
English translation of Succah (Soncino). (1 Meg) :
click here.
Chashukei Chemed on Succah. Interesting halachic issues related to the daf. Covers the whole maseches. By HaRav Yitzchok Zilberstein (17 Meg) :
click here.
Ein Yaakov vol 1, including Succah. (122 Meg) :
click here.
Peirush Chai on Succah. Explanation through illustrations. (5 Meg) :
click here.
Peirush Chai on Shabbos. Explanation through illustrations. Covers through daf 101b (7 Meg) :
click here.
Daf al Daf on Shabbos vol. 1. Running commentary. Likut. Covers through daf 76 (34 Meg) :
click here. (The links to volumes 1 & 2 are now correct. Why didn't someone tell me?)
Daf al Daf on Shabbos vol. 2. Running commentary. Likut. Covers 77 through end (24 Meg) :
click here.
Sde Tzofim on Shabbos. Long quotes and comments on major issues raised on each daf. (51 Meg) :
click here.
Derech Yeshoro on Brochos. Questions and answers for review. Covers through daf 23 (0.4 Meg) :
click here.
Chashukei Chemed on Brochos. Halachic issues related to the daf. Covers the whole maseches. By HaRav Yitzchok Zilberstein (1.4 Meg) :
click here.
Emmes LeYaakov on Brochos (same as on Niddah). by HaRav Yaakov Kamenetsky. Includes Zeroim and Taharos. 169 pages on Brochos (24 Meg) : click here.
Kovetz Shittos Kamai on Brochos. Published 5768. Part 2: From כז to מד:. A lot of material. There is so much material that you can be pretty sure that someone has commented on the issue that you are interested in. (53 Meg) : click here.
Ben Yehoyodo, Vol 1. Commentary on Aggodos. Includes Brochos and Shabbos From the Ben Ish Chai - Rav Yosef Chaim of Baghdad (33 Meg) : click here.
Ran on Niddah. Published 5733. In "square" (non-Rashi) letters. The rishon whose comments appear around the Rif at the back of the standard gemora. (4 Meg) :
click here.
Eizehu Meokomon on Niddah. Published 5766. Short comments and references to major issues. Covers the main issues raised on each daf. (4 Meg) : click here.
Emmes LeYaakov on Niddah. by HaRav Yaakov Kamenetsky. Includes Zeroim and Taharos. 20 pages on Niddah (24 Meg) : click here.
Chut HaShoni on Hilchos Niddah. by HaRav Nissim Karelitz. Published 5770 (revised). (4 Meg) Organized by simanim of Shulchon Oruch. Includes a summary and detailed index. 485 pages : click here.
Ben Yehoyodo on Erechin , Vol 5. Commentary on Aggodos. Also includes Sanhedrin to end of Nezikin, other Kodshim masechtos and Niddah. From the Ben Ish Chai - Rav Yosef Chaim of Baghdad (33 Meg) : click here.
Gemora (173 meg) בכורות: click here (127 meg).
This is not the Wagschal Shas, but the standard Vilna Shas. The Bechoros volume also includes Me'ilah. The quality
is not as good as the Wagschal Shas.
I selected these as appearing to be the best available for a daf yomi learner.
Pe'as HaKodesh on Temurah and Meilah, by Rabbi A. Grandes. The latter starts on page 226. Organized by daf. A contemporary commentary with long and short comments. (21 Meg) : click here.
Neizer HaKodesh on Meilah, by Rabbi Moshe Rosen A European rov who moved to America. Published in 1943. Organized by daf. A commentary with long and short comments. (12 Meg) : click here.
Asifas Zekeinim Chodosh on Temura. Published by Kaleb chassidim. 12 acharonim. (24 Meg) : click here.
Otzar Hashittos on Temurah. 3 commentaries on Temurah (20 Meg) : click here.
Still relevant to Temurah...
Asifas Zekeinim on Bechoros, Erechin, Temura, Me'ila, Kerisus, Tomid. Published by the Chofetz Chaim to supply meforshim on the small masechtos of Kodshim. (22 Meg) : click here.
Ben Yehoyoda on Erechin , Vol 5. Also includes Sanhedrin to end of Nezikin, other Kodshim masechtos and Niddah. From the Ben Ish Chai - Rav Yosef Chaim of Baghdad (33 Meg) : click here.
Kovetz Meforshim on Erechin , Vol 1. 383 pages covering the first perek (6 dapim) (5 Meg) : click here.
Ben Yehoyodo on Erechin , Vol 5. Also includes Sanhedrin to end of Nezikin, other Kodshim masechtos and Niddah. From the Ben Ish Chai - Rav Yosef Chaim of Baghdad (33 Meg) : click here.
Tosafos Shantz on Bechoros. Published 5757. (9 Meg) : click here.
Shemen Rokach on Bechoros. by HaRav Shimon Dubinsky. With haskomos from HaRav Elya Boruch Kamai, the Oruch Hashulchon and HaRav Chaim Ozer Grodzinsky. (11 Meg) : click here.
Ran on Chulin. Published 5733. In "square" (non-Rashi) letters. The rishon whose comments appear around the Rif at the back of the standard gemora. (7 Meg) : click here.
Beiurei HaDaf on Chulin. Published 5764. Part 1: From ב to :צו. Running commentary on the dapim indicated. (23 Meg) : click here.
Beiurei HaDaf on Chulin. Published 5765. Part 2: From צו to קיז:. Running commentary on the dapim indicated. (29 Meg) : click here.
Beiurei HaDaf on Chulin. Published 5765. Part 3: From קיז to קמב:. Running commentary on the dapim indicated. (13 Meg) : click here.
New! Tishrei 5772
Kovetz Shittos Kamai on Chulin. Published 5766. Part 3: From צו to קמב:. A lot of material but very useful since there are so few rishonim on Chulin. There is so much material that you can be pretty sure that someone has commented on the issue that you are interested in. (103 Meg) : click here.
Sde Tzofim on Chulin. Published 5764. Long quotes from major commentaries, and comments on major issues raised on each daf. (69 Meg) : click here.
Eizehu Meokomon on Menochos. Published 5770. Short comments and references to major issues. Covers the main issues raised on each daf. (6 Meg) : click here.
Sde Tzofim on Menochos. Published 5764. Long quotes and comments on major issues raised on each daf. (52 Meg) : click here.
Asifas Zekeinim on Zevochim, compiled by the Chofetz Chaim and comprised of four commentaries: from HaRav Aharon Shmuel Kaidenower, HaRav Avrohom Chaim Shor, HaRav Meir Eisenstadt and HaRav Nosson Burgil (47 Meg) : click here.