Franz Liszt's piano transcriptions of the 9 symphonies of Beethoven are fairly well-known (my personal favorite recording is the set by Cyprien Katsaris) but less famous are Liszt's transcriptions of Beethoven's song-lieder and the Opus 20 sextet. Youtuber liszt73 has quite a few performed by Leslie Howard, and so I might as well just make a handly list of these piano arrangements (except the symphonies, they're easy enough to find).
Adelaide op. 46, S466, (1839-1847)
6 Lieder von Gellert op. 48, S467, 1840:
- 1. Gottes Macht und Vorsehung op.48 No 5
- 2. Bitten, op.48 no. 1
- 3. Busslied, op.48 no. 6
- 4. Vom Tode, op.48 no. 3
- 5. Die Liebe des Nachsten, op.48 no. 2
- 6. Die Ehre Gottes aus der Natur, op.48 no. 4
An die ferne Geliebte - Song Cycle of Jeitteles, op.98, S469, 1849:
- 1. Auf dem Hugel sitz' ich spahend
- 2. Wo die Berge so blau
- 3. Leichte Segler in den Höhen
- 4. Diese Wolken in den Höhen
- 5. Es kehret der Maien
- 6. Nimm sie hin denn dieser Lieder
6 Lieder on Goethe, S468 (published 1849):
- 1. Mignon, Op.75
- 2. Mit einem gemalten Bande, Op.83 no. 3
- 3. Freudvoll und leidvoll, Op.84b no. 4
- 4. Es war einmal ein König (Mephisto's Flohlied), Op.75 no. 3
- 5. Wonne der Wehmut, Op.83 no. 1
- 6. Die Trommel gerühret, Op.84b no. 1
Septuor in E flat, op.20 (1799-1800), S465 (1841):
- 1. Adagio, Allegro Con Brio
- 2. Adagio cantabile
- 3. Tempo di menuetto
- 4. Andante con variazioni
- 5. Scherzo: Allegro molto e vivace - Trio - Scherzo da capo
- 6. Andante con moto alla marcia - Presto
Liszt was also a big fan of The Ruins of Athens...
March from the Ruins of Athens, S388a (1846)
...so much so that he did his own improvisations on some of the themes...
Capriccio alla turca sur des motifs Beethoven's Ruins of Athens S388 (1846)
Fantasy on Beethoven's Ruins of Athens S389 (piano version) (1852)
Fantasy on Beethoven's Ruins of Athens S122 (Orchestral version)
Lastly for Liszt, he also wrote a cadenza for Beethoven's Piano Cto 3 Op 37, S389a - tho I couldn't find a recording of that one sadly...
Which brings me to Charles-Valentin Alkan, whose transcription of Piano Concerto 3 for solo piano (with his own cadenza) I COULD find, here performed by Marc-Andre Hamelin (a good composer in his own right):
Beethoven/Alkan: Piano Concerto No.3 in C minor I. Allegro con Moto (Part I)
Beethoven/Alkan: Piano Concerto No.3 in C minor I. Allegro con Moto (Part II)
Alkan also made a piano arrangement of the "Cavatina" 5th movement of Beethoven's String Quartet Op. 130: Beethoven/Alkan: Cavatina
Richard Wagner Piano transcription of Symphony 9 - 4th Movement
There's even a version of the full opera Fidelio in piano 4-hands - arranged by Alexander Zemlinsky.
More recently, here's a piano transcription for 8 hands (yes, 8!) of the Egmont Overture: Egmont, Ouverture - Trascrizione per 2 pianoforti a 8 mani
When Beethoven found about all these "upstarts" doing piano transcriptions of his symphonies (except for his friends of course) he oftentimes disowned them, or if he got really outraged he'd do a transcription of his own - tho generally he didn't think much of transcriptions and alternate arrangements. That of course didn't stop him from using the Eroica/Prometheus theme in 4 different works...
Here's a sketch fragment of Beethoven's own attempt to transcribe the 7th Symphony - it sounds a bit half-hearted - and then he pretty much tosses it in the trash at the end, probably because he had to get back to work on the Missa Solemnis...
Symphony No 7 in A major, Op 92, 1st Movement Fragment transcribed by B.
OK - I think that about covers it...