I have been making my own liquid laundry detergent for years now, and am completely satisfied with the results. Not to mention that a years supply costs me under $10.
Liquid Laundry Detergent
1/2 bar Phels Naptha Soap
1/2 c. borax
1/2 c. washing soda
2 gallons+ sized bucket
32 c. water
25-30 drops essential oils (optional)
In large sauce pan, heat 6 c. of water and grated soap.
Heat, stirring occasionally, until soap is completely dissolved.
Remove from heat.
Add borax and washing soda.
Stir until completely dissolved.
In bucket, add 4 c. hot water.
Pour soap mixture into bucket and stir.
Add 22 c. of water to the bucket and stir.
Add essential oils and stir.
Let soap sit in bucket, undisturbed, for 24 hours so it can gel.
Stir to break up clumps and pour into containers.
Use 1/2 c. for each extra large load.
For more pictures with thorough detailed instructions, go here.