Yeah, there are a whole bunch of lullabies out there, but there only about five I sing on a regular basis.
5. You Are My Sunshine -- Not the original version (check out the O Brother, Where Are Thou? soundtrack for a nice version of that), but the shorter version on the Songs For Wiggleworms disc. It's much more loving and doesn't include the lyric "You have shattered all my dreams," which I frankly think is a bit of a downer, lullaby-wise.
4. Wake Up, by the Arcade Fire -- Just kidding.
4. All The Pretty Little Horses -- A sweet melody; I try to remember that it doesn't matter if I can't remember what order "blacks," "bays," "dapples," and "grays" go in.
3. Twinkle Twinkle, Little Star -- An easy melody, simple words (except that nobody -- including me -- can remember anything other than the first verse. There are something like four or five verses.)
2. Brahms' Lullaby -- Which we all call the "doo doo doo" song. For fun with older kids, ask them to sing it in the style of animals. ("Quack quack quaaaaack, quack quack quaaaack...")
1. Skidamarink -- A bit uptempo for a lullaby, but it's a fun melody, easy lyrics, and even offers freedom to solo. Love this song.
There are lots of lullabies I like to hear (e.g., "The Water Is Wide"), but unless the melody and lyrics are both super easy, they are just unlikely to be sung in actual nurseries...