supplementing the empty heading propsed
Anonymizing Networks: VPN's
Collaboration: Google Docs
Email Encryption: iGPMail
File Sharing: SpiderOak or other HTTP webb hosting
Firmware: MikroTik RouterOS
Mail Servers: Zimbra Collaboration Suite, MDaemon Messaging Server, SophiMail, MyInfo, IBM Notes, Microsoft Exchange Server, HyperOffice Email Service
Operating Systems (Live): AmigaOS
SIP Servers: RingCentral, Dimelo, Zent.io, VoipSwitch, Thirdlane Business PBX, Thirdlane Multi Tenant PBX, Natterbox, Avaya Voice Portal, Cloud Telephony, Genesys, MiRTA PBX, Ozeki Phone Systems, uContact idk which popular
XMPP Servers: Bopup Communication Server
Edited by Stainges