cottages_clay.png (washing place, stairs and slab)
From the supplied minimal game:
cottages_minimal_wood.png
PilzAdam (WTFPL; default and beds mod):
cottages_junglewood.png
cottages_beds_bed_side.png
cottages_beds_bed_side_top_l.png
cottages_beds_bed_side_top_r.png
cottages_beds_bed_top_bottom.png
cottages_beds_bed_top_top.png
Derived from Universal schema.jpg by Stefanie Lindener, which can be found here: http://de.wikipedia.org/w/index.php?title=Datei:Universal_schema.jpg&filetimestamp=20060510110309& The texture is CC-by-sa 2.0/de.
cottages_slate.png
Textures not provided but used (need to be supplied by a default mod):