Designing and developing game software for use with computers, computer networks, mobile and cellular phones, and handheld electronic devices; providing temporary use of on-line non-downloadable software and mobile applications to enable consumers and businesses to manage, use and transfer digital assets, cryptocurrency and other ledger technologies; providing temporary use of on-line non-downloadable software and mobile applications for use in accessing, reading, tracking, and using blockchain technology; providing on-line non-downloadable computer software for use in managing and using blockchain technology and computation thereof; platform as a service (PAAS) featuring computer software platforms for providing design, testing, deployment, and management of blockchain systems; software as a service (SAAS) featuring computer software for the management, use and transfer of digital assets, cryptocurrency, crypto-collectibles and application tokens