
Mailpile
Horde
ProtonMail
Mailo
HEY
Cypht
Soverin
Roundcube
SourceForge
GitHub
GitLab
BitBucket
openDesktop.org
Gitea
Launchpad.net
OSOR
Mailpile
SourceForgeHorde - Horde Groupware is a free, enterprise ready, browser based collaboration suite.
GitHub - Originally founded as a project to simplify sharing code, GitHub has grown into an application used by over a million people to store over two million code repositories, making GitHub the largest code host in the world.
ProtonMail - Secure email with absolutely no compromises. Get your free encrypted email account today.
GitLab - Create, review and deploy code together with GitLab open source git repo management software | GitLab
Mailo - Mailo is an email client where you can send and receive emails to and from anyone with an email address.
BitBucket - Bitbucket is a free code hosting site for Mercurial and Git. Manage your development with a hosted wiki, issue tracker and source code.