Singapore <-> Kuala Lumpur Coaches

If you are visiting Kuala Lumpur from Singapore or vice-versa, you may want to take note of these coaches site for you travel needs.

http://www.supercoach.com.my/
http://www.gunungraya.com/
http://www.plusliner.com/
http://www.aeroline.com.my/
http://www.transtar.com.sg/

(apparently some of the above seems to be down)

You might also want to buy ticket at the counters at:
Kuala Lumpur: Pudu Raya
Johor: Larkin Bus Interchange
Singapore: Golden Mile, Jurong Point, Boonlay Place

These are recommended budget bus:
KKKL
Transnational
GunungRaya/SuperCoach

These are some references that might be helpful:
http://www.cuti.com.my/
http://www.journeymalaysia.com/bus.htm