Developing open-source software for adoption by blockchains for the building of applications on the blockchain; Providing online non-downloadable software for use in building, developing, executing, and running other software and applications on the blockchain; Providing temporary use of on-line non-downloadable software development tools for exchanging assets, namely, blockchain and other digital assets and currencies; Providing online non-downloadable computer software development tools for the creation of blockchain applications; Computer and technological services, namely, platform as a service (PAAS) featuring computer software platforms for computer system and application development, deployment, and management enabling users to develop, build and run distributed applications based on blockchain technology; Providing temporary use of on-line non-downloadable software development tools