Equitable access to and availability of platforms and tools used for collaboration in online communities

There have been pockets of discussion within The Carpentries community around this subject in the last year or so, and these four events stand out as our 'why' for putting out a more formal request for community input around this subject at this time:
+ While writing a communications strategy for The Carpentries in Q1 2019, we heard from community members that certain tools and platforms that The Carpentries uses are inaccessible to community members in certain countries and regions around the world.
+ In December 2019, as our community chatted about The Carpentries teaching of Git and use of GitHub ([see blog post](https://carpentries.org/blog/2020/05/conversations-teaching-git-github/)), this issue was also raised in discussions.
+ In June 2020, while preparing for 2020.carpentrycon.org, CarpentryCon Task Force checked in with some community members to determine what alternative platforms could be used during sessions in order to make the virtual conference a more inclusive experience.
+ In August 2020, Steve van Tuyl posed a question in [The Carpentries' Slack](https://swc-slack-invite.herokuapp.com/) '_about where to find out what countries restrict access to what software applications/web applications_' and with an aim to use this to guide the organising of a virtual hack week with international communities participating

We would like to hear from you:

**what tools and platforms used by The Carpentries are inaccessible or unavailable to people in certain regions around the world?**

Please share as much detail as you can, with links where possible, and remember to mention affected countries / regions in your response.

We hope to gather input over the next few weeks, as we work to organise for community discussions to deliberate, and determine a way forward.