Transcriptions, arrangements etc.
→ Gigue by Jean-Mari Leclair (clarinet and piano)
It was typeset from an old handwritten copy and I have no idea which opus it may be from since I couldn't find the original violin version on IMSLP or elsewhere, or even if it's really Leclair (though the style is consistent with his other works). Regardless, it's a pretty, even if challenging piece.
→ Weber's sonatina
A sonatina from Weber's Six Pieces collection, made into a solo piece.
→ Tico Tico no Fuba
The ever popular, archetypical samba by Zequinha de Abreu.
Note: if you are studying for the ABRSM exam, please be aware that this arrange is not approved by the board. Get an arrange by Florent Héau (2014, Gérard Billaudot's edition), or check with the your school.
→ Sunrise Song
An oboe piece by Sergey Vasilenko, a soviet composer (the original russian title is “Песня на рассвете”)
Note that this piece is most likely not in the public domain since Sergey Vasilenko died in 1956. I have no idea who you should talk to if you want to license it. It's a nice piece though and I'll rather push the limits of fair use to spread it.