Computer software platforms, downloadable, for allowing on-line transactions between sellers and buyers of goods and services; computer software for listing, searching for, browsing and purchasing goods and services in on-line marketplace; downloadable software in the form of applications for use on mobile phones, tablet computers and personal computers for displaying and sharing user data, photographs and images, and for searching and locating other users and locations and interacting with them; downloadable software applications for use on mobile phones, tablet computers and personal computers for displaying stylized icons; computer software for publishing online reviews and recommendations relating to goods and services of others; application programming interfaces for computer software which enable online services for social networking, creating applications for social networking and for enabling the retrieval, uploading, downloading, accessing and management of data; computer software to enable uploading, downloading, accessing, posting, displaying, tagging, blogging, streaming, linking, sharing or otherwise providing electronic media or information via computer and communication networks.; Downloadable computer e-commerce software to allow users to perform electronic business transactions via a global computer network