MY Kora.li is a web platform offering plugins in development (more will be added regularly) which cover a lot of needs.

The Reef is the market place where you can discover useful plugins, and decide toenable them in the left menu.

Those plugins are fully integrated to the platform for better performance, but you can also use them separately, as you need.

A reef is a shoal of rock, sand, coral or similar material, lying beneath the surface of water. Many reefs result from natural, abiotic processes—deposition of sand, wave erosion planing down rock outcrops, etc.—but the best known reefs are the coral reefs of tropical waters developed through biotic processes dominated by corals and coralline algae. -- Wikipedia