The rapid growth of the digital economy has significantly increased the demand for freelancing platforms that connect clients with skilled professionals. This review paper analyzes various existing freelancing systems and platforms, focusing on, their features, methodologies, and limitations. It highlights key aspects such as user interaction, project management, bidding systems and security mechanisms. The study also identifies research gaps in existing systems, including lack of intelligent recommendations and integrated solutions. This paper provides insights into improving freelancing platforms through advanced technologies and better system design.