Air on the G String from  Johann Sebastian Bach's Orchestral Suite No. 3  BWV 1068.
For Classical Guitar solo, with tablature, with downloadable mp3 for audio help, 2 pages, Intermediate, 3:35' min.
Tablature has the advantage of a very short learning curve and does not require extensive study to learn while the audio file makes the score interpreting even easier.

Just the Two of Us is a 1981 R&B single written by Bill Withers, William Salter and Ralph MacDonald. The song won a Grammy Award for Best R&B Song.
For classical guitar or acoustic-fingerstyle guitar with tab, early intermediate.
Pages: 6 pages.

Schwanengesang ("Swan song"), is the title of a collection of songs written by Franz Schubert at the end of his life and published posthumously. Ständchen "Serenade" is the most popular and famous. 
For Guitar and ensemble. Guitar early intermediate with some fingering suggestions.
With downloadable mp3's for audio help (one file with all, one file without the guitar for play-along or practice the guitar).
Pages: 7 pages (4 pages full score (Guitar, violin 1, violin 2, cello), 1 page Guitar standard notation only, 2 pages Guitar standard and tablature notation)). 4:10 min.

Under Paris Skies is a song initially written for the 1951 French film Sous le ciel de Paris, directed by Julien Duvivier.
Thanks to Juliette Greco and subsequent recordings by artists such as Edith Piaf and Yves Montand the song became a symbol of Paris and France for the whole world.
The English version was titled "Under Paris Skies". It was recorded in that form by Andy Williams, Bing Crosby, Sam Cooke and many others. The melody of the song is used as a background for the song "Live Circus" on the concert album Glitter and Doom Live by Tom Waits.
For fingerstyle Guitar solo.
With standard guitar notation and guitar Tablature.
With finger positions suggestions.
Early Intermediate.
Guitar in drop D tuning (low E to D).
Five (5) pages, 2:50' min.

The Prelude Op. 28, No. 4 by Frédéric Chopin is one of the 24 Chopin preludes. By Chopin's request, this piece was played at his own funeral, along with Mozart's Requiem.
For classical Guitar solo, with tablature and downloadable mp3 for audio help, 2 pages, 2:20' min, early intermediate.