You're likely to utilize Slack or other video tools for conferencing if working remotely. These 2D tools aren't always the best tools for encouraging the connection and collaboration among team members.
Collaboration spaces are crucial. The most effective virtual spaces mimic the physical office experience by having meeting rooms, desks and common areas. This allows teams to find each other quickly. With the help of a few nudges, or live chats teams can engage in conversations that are natural and also have spontaneous meetings that are like those that take place in an actual office.
Kumospace is a virtual workspace helps to reduce the need to meet by giving people the sense that they are "working next someone". It also offers a variety of virtual rooms for collaboration, from sprint planning and 1:1 catch-ups, to project presentations and sales demos.
Switchboard is a different virtual collaboration tool that can take the experience of being in an office to a whole new level. Its collaborative virtual rooms and canvas enable teams to be productive quickly, working together using browser-based applications and documents. When the session is finished, the entire work is saved so that everyone can go on where they began.
Other virtual spaces like Teemyco and Gather help foster teamwork by making it easier for coworkers to see what they are doing in the virtual office. It's easy for anyone to know whether someone is working on a major project, giving an informational presentation or simply taking a virtual break.