Apps to Online Collaboration

Manic Digger is a free-to-play, open-source 3D block-building sandbox game. Inspired by Minecraft, it offers a vast, procedurally generated infinite world where players can build, explore, and interact in multiplayer environments. With strong modding support via Lua scripting and a focus on community, it provides a creative and engaging experience for individuals and groups.

Calligra Stage, formerly known as KPresenter, is a free and open-source presentation software designed for creating compelling slideshows with a focus on flexibility and compatibility.

Dudle is an open-source online survey and event coordination tool designed for simple and private scheduling without registration. It prioritizes user privacy and provides a clean, ad-free experience for creating polls and managing meeting availabilities.

Minetest is a free and open-source voxel game engine, similar to Minecraft. It allows users to build various structures, explore vast, procedurally generated worlds, and engage in survival-based gameplay or creative construction. Its strong emphasis on modding and community contributions provides a highly customizable and extendable experience.

Kolab Community is a comprehensive, free, and open-source groupware suite designed for collaborative work. It provides integrated email, calendar, contacts, and tasks functionalities, empowering individuals and teams to communicate and manage their data efficiently and with a strong focus on data privacy.