Burgmüller, 25 Easy and Progressive Studies, Op. 100

These are nice pieces for someone at my level: They get more difficult as they go, and they're not boring. You can download the music from IMSLP. There are lots of YouTube videos about these, too.

The links below are to Musescore.com that various people have uploaded into it, including a lot of the 'classics'. You can download these or play them (in your browser, via MIDI) directly from the site.

• Candor, No. 1
• L'Arabesque, No. 2
• Pastorale, No. 3
• The Little Reunion, No 4
  
• Innocence, No. 5
• Progress, No. 6 
• The Limpid Stream, No. 7
• Grace, No. 8
• The Chase, No. 9
• Tender Blossom, No. 10
• The Wagtail, No. 11
• The Farewell, No. 12
• Consolation, No. 13
• La Styrienne, No. 14
  
• Ballade, No. 15
• Tender Grieving, No. 16 
• The Chatterbox, No. 17
  
• Inquiétude, No. 18
• Ave Maria, No. 19 
• Tarantella, No. 20
• Harmony of Angels, No. 21
• Barcarolle, No. 22
• The Return, No. 23
• The Swallow, No. 24
• Spirit of Chivalry, No. 25