A lot of these have probably already been mentioned but if they have then +1 to them!
Fabric Based :-
Bean Bag - made from general fabric and beans
Meditation Mat - made from general fabric and plain bubbles
Welcome mat - made from general fabric and fiber
curtains - made from general fabric and string
Wood based :-
Large dining table (that is much longer than a normal table) - made from boards, beams, posts and snails
Notice board (like in community machine rooms) - made from boards, posts and snails
Large picture frame - made from boards posts and snails
Metal based :-
Anvil - made from various metals
statue - made from various metals
Powered by items :-
Jukebox - made with boards, posts, snails and metal rods - add music blocks to add tracks
Bubble machine - made with a bubble tuner, planks, metal rods and snails - add bubbles to get bubbles blown around the area for a set time.
Smoke machine - made with a gassifier planks, metal rods and snails - add gasses to get a thin trail of smoke accross the floor of the room for a set time.
Essence based :-
Red dye - essence of rookswart and water
Pink dye - essence of grandlevery and water
Blue dye - essence of silvertongue and water
Green dye - essence of rubeweed and water
Yellow dye - essence of yellow crumb and water
Grey dye - essence of hairball and water
Purple dye - essence of purple and water
(water is currently obtained from bureaucratic establishments)
Possible future resources to aid in furniture making -
Pure water - obtained by melting ice
Sand - could be obtained in places like Jal
Glass - made by smelting sand
Glue - made by mixing things together (not sure what though)
Sheet metal - made in a metal machine from just plain metal ingots.
Thanks for reading!