Fiverr is a platform for independent contractors that links companies with contractors that provide digital services in a range of categories, including writing, graphic design, psta kngrogramming, & marketing. Offering users the flexibility to create gigs and set their own prices makes it a lucrative side gig. 3. Ibotta: Ibotta is a cashback app that lets users buy commonplace products like groceries, apparel, and electronics and get paid in cash. To receive cash back on eligible purchases, users only need to upload their receipts. 4. .