An outsourcing company that will work on one-off or ongoing projects. No rates on their site. They're busy, may be a delay responding to requests.
Agents of Value are a Philippines based outsourcing company specialising in tech based services, with some secretarial work.
AskSunday are a quick task outsourcing company. They offer plans including a number of "tasks" which typically take 20 minutes each to complete. Starts from $17/mth for about 10 tasks. They have project based plans "Sunday Projects", price on request.
GetFriday are an outsourcing company starting from $15/hour on a pay-as-you go model. Drops down to $10/hr for 20hrs/mth or as low as $7/hr for 160hrs/mth. Time and a half at the weekends.
Brickwork are an Indian outsourcing company. They offer two levels of service basic / premium. They've been around since 2004 and gained fame in a couple of books (World is Flat, 4 hour work week).
Webgrity is an outsourcing company. I think they do lots of work on elance and other freelancer sites.
Globe Task is a virtual outsourcing company. Rates start at $12 per hour for pay as you go and drop to $8/hour for 40 hours / month.
DoMyStuff.com is an online outsourcing site where you post jobs and people bid on them. Like RentaCoder.com but for any type of task.
Hire staff on a monthly basis starting from $400/mth part time or $700/mth full time.
VirtualEmployee help you to recruit offshore staff and provide a location for them to work from. Real people, real jobs. Starting from $700 / month.
Support Resort offer outsourcing services to India / Philippines. You can hire an individual programmer / admin assistant / etc on a part time, full time, or 24/7 team basis. Rates start from around $400 a month with a setup fee. 24/7 tech support $2k/mth