Google Docs - Create a new document and edit with others at the same time -- from your computer, phone or tablet. Get stuff done with or without an internet connection. Use Docs to edit Word files. Free from Google.

Artica Proxy - Artica Proxy is an appliance that claim to manage Squid-cache proxy with all features that Squid...

Airborn - Create and edit documents online without sacrificing your privacy

Polipo - A small and fast caching web proxy (a web cache, an HTTP proxy, a proxy server).

Bit.ai - Bit is a smart real-time document collaboration platform for teams to create interactive documents, manage digital content and track document insights.

Privoxy - Privoxy helps users to protect their privacy.