仅供参考

Donation:
1) Goodwill http://www.goodwill.org/index_gii.cfm/1131/
2) salvation army.
you can find them in the yellow page/local phone book.

Relo:
Contact your company HR for recommendation. You can also find many companies in the yellow page. The two largest companies are 1) United Van Line, they have many agents through the country 2) Belkins.
Both are not cheap though. How does your company pay the relo? do they agree to reimburse the amount against the invoice? or they have paid you a lump sum upfront?

Good luck