here is a thorough list
I've used a few, here is my experience
Santa Fe and Asian tigers are usually the top of the crop.
Santa Fe's service is faultless. the service extends beyond your move with a dedicated customer service coming to visit you, relocation booklet and invites to events to help you meet expats and settle.
If the company pays, look no further, they all quote pretty much the same.
Asian tigers on 2 occasions failed us on delivery. The crews packing/unpacking crews both in the UK and locally were very professional but the surveyors had miscalculated a few things when quoting.
Coming from London our shipment arrived more than one week early and they wanted to charge us storage fees even though we had clearly indicated that we would not have an address to deliver to until a specific date.
During an trans-Asia move, they forgot to include in the quote hoisting oversized item and presented us with a bill that was inflated (I know because I had used the same hoisting company to bring things in in the first place.)
On both occasion though, they ended up absorbing the cost very graciously as it was clearly their shortcoming.
We Also used Allied Pickford and were very satisfied.
Crown and AGS four winds come highly recommended too.
Enjoy spring cleaning!
remember that Singapore is a very humid climate.
I would suggest leaving all winter clothes, good leather etc... neatly packed back home with relatives if you can.
Just pack one suitcase with a minimum winter kit in case you make a trip back home in winter.
Stock up on books, one pair of good school shoes for the kids (they'll just need one pair as they will only wear their crocs/havaianas)
And underwear for you, although M & S stocks up everything now.