Casey
I cannot help you at all with the first but it does appear to be pattern welded.
The second is definitely a moro kris Sundang with better pictures someone here will pin it down more for you . You can also look here
http://home.earthlink.net/~federicom...aponsmain.html
The last could be a Parang Sumbawa but may not be right without better pictures of the blade shape and handle. Does it look like this
http://perso.wanadoo.fr/taman.sari/p...awa/sum01a.jpg
http://perso.wanadoo.fr/taman.sari/p...awa/sum01p.jpg.
if so you can find more on it at this great site
http://perso.wanadoo.fr/taman.sari/
The naga I have been told is common on weapons from Sumatra
I hope this helps and I look forward to seeing the other pictures