I've worked on several remote teams and for keeping up with each other the best combo I've found is a daily chat based standup, optionally with a standup-bot. A

I've worked on several remote teams and for keeping up with each other the best combo I've found is a daily chat based standup, optionally with a standup-bot. Along with a ticket tracking systems with an in-progress state + a dashboard layout that includes your teams in-progress stuff. For example my dashboard I has a 2 column layout, on the left top is my in-progress stuff and down the left side is the other team members in progress stuff. On the right top is my assigned tasks and below is monitored tasks. This layout is useful to me for tracking my work and I get to stay aware what the others are working on. It helps a lot to keep tickets small in scope, so you can rotate them fairly often. Of course what works depends on the nature of your teams work. Anyways, just some ideas.