Freelancers (project-based independent workers — designers, developers, writers, consultants, marketers) have software needs centered on client capture + delivery + getting paid.
The dominant freelance management platforms: Bonsai, HoneyBook, Dubsado, 17hats, FreshBooks (with proposal + invoicing), Hectic, AND.CO. These bundle proposal/contract/invoice/payment in one workflow.
Above that: time tracking if billing hourly (Toggl, Harvest, Timely), portfolio + presence (own site or Behance/Dribbble for designers), and finding work (Upwork, Fiverr, Toptal, Contra, niche communities like Polywork).
The financial reality most freelancers underrate: rate-setting matters more than tool choice. Freelancers undercharge by 30-50% on average; rate calculators (Bonsai Rate Calculator, freelancehourlyrate.com) plus competitive research win more than any single piece of tech.