ConceiveAbilities is an egg donor and surrogate agency, which connects prospective parents with women of child-bearing age, who are willing and able to carry a baby or donate an egg to help another person have a baby.

Expected pay: $10,000 – $100,000 (see review)

Husl$core: $$$$$

Expert Institute is a legal services firm that recruits expert witnesses who can opine intelligently about everything from accounting to anesthesia to help lawyers in civil and criminal trials.

Expected pay: You set it

Husl$core: $$$$$

Robert Half connects workers with contract, temporary and permanent jobs in finance and accounting; tech; marketing & sales; health care; law; and administration. 

Expected pay: varies by position

Husl$core: $$$$$

Rare Patient Voice seeks caregivers and patients to provide feedback on medical products, drugs, and other aspects of health care.

Expected pay: $120 per hour

Husl$core: $$$$$

Carelinx serves as a matchmaker between caregivers and people who need help

Expected pay: $15 per hour, on average

Husl$core: $$$$

TrustedHealth matches nurses with travel nursing jobs that meet their skill level and career goals

Expected pay: $4,000 – $10,000 per month

Husl$core: $$$$

Altasciences is a medical research firm that enlists individuals to volunteer for paid clinical trials.

Expected pay: varies by study

Husl$core: $$$$

Fortrea Clinical Trials is a biomedical research firm that pays individuals to participate in clinical trials.

Expected pay: varies, but substantial

Husl$core: $$$$

ConnectRN is a staffing platform for medical professionals — nurses, clinicians, medical technicians and assistants — who want to pick up extra shifts.

Expected pay: Varies by position (see review.)

Husl$core: $$$$

Nursa connects medical facilities with nurses interested in working per diem shifts

Expected pay: Varies by facility, credentials and shift

Husl$core: $$$$

WCCT Global/Altasciences is one of a number of medical research firms that recruits and pays individuals to take part in drug trials and other medical research.

Expected pay: varies widely

Husl$core: $$$$

Want to earn hundreds of dollars testing medical treatments? “Volunteer” for clinical studies with a site called Velocity Clinical Research.

Care is an employment site for baby sitters, pet-sitters, nannies, elder-care, housekeeping and home care nurses

Expected pay: $15 – $75 per hour (You set it)

Husl $core: $$$$

Covance Clinical Trials is a medical research firm that pays people who volunteer for clinical trials

Expected pay: varies widely

Husl$core: $$$$

Biomat Plasma Centers pay individuals to donate plasma — a yellow substance that carries blood cells around — for medical research.

Expected pay: $25 – $50 per hour

Husl$core: $$$$

Jitjatjo hires part-time employees to work in education, stadiums, restaurants, hotels, retail and health care establishments.

Expected pay: $10 -$30

Husl $core: $$$$

Princeton Consumer Research is a medical research company that specializes in cosmetic treatments ranging from wrinkle creams to cellulite cures

Expected pay: varies

Husl$core: $$$$

Octapharma Plasma pays people to donate plasma on a regular basis, and provides bonuses when the need is particularly great.

Expected pay: $45 – $100 an hour (est)

Husl$core: $$$$

Catalant, formerly HourlyNerd, connects skilled freelancers with companies needing help with anything from logistics to marketing.

Expected pay: $100+ per hour

Husl$core: $$$$

Medely is a marketplace that connects short-staffed health care facilities with medical staffers willing to take on per diem work

Expected pay: $20 – $80+ per hour

Husl$core: $$$$

BetterHelp connects counselors with patients, helping a wide array of social workers, counselors, psychologists and therapists practice online

Expected pay: $20 to $70 per hour

Husl$core: $$$

JustAnswer pays experts in everything from engineering to medicine for answering consumer questions

Expected pay: $2 – $20 per question

Husl$core: $$$

Parexel is a biomedical research company that enlists individuals for paid clinical trials.

Expected pay: varies widely, but substantial

Husl$core: $$$

CSL Plasma pays sometimes generously for plasma donations

Expected pay: $40 – $100 per donation

Husl$core: $$$

ElderCare.com is a marketplace where families needing care can connect with caregivers providing both medical and non-medical senior care

Expected pay: You set your rates

Husl$core: $$$

JurisPro encourages individuals to list themselves on the site’s expert witness directory. But it charges a substantial annual fee to do so.

Expected pay: speculative

Husl$core: $$

Veyo connects drivers with seniors and disabled people needing a lift to non-emergency medical appointments

Expected pay: $8 to $14 per hour

Husl$core: $$

Bark offers to connect service providers of all kinds with potential customers. But you pay for leads that are sometimes worthless.

Expected pay:You set it yourself

Husl$core: $$

Pleio enlists freelancers for remote customer service positions in its GoodStart program, which involves calling patients to talk about their medications.

Expected pay: $0 – $15 per hour (est. See Review)

Husl$core: $$

Trusting Heart Blood Centers aims to solve the nationwide blood shortage by paying donors are treating them like they’re going to a spa, but the site went out of business

Expected pay: $25 + (est) per hour

Husl$core: $