Google Profiles some limilted google sites like blogspot that had open user about likre pages.

Old Plus closed...
 exploring now, what is an Apache Wave called incubation)
https://incubator.apache.org/projects/wave.html

 Google originally developed it as Google Wave.^[1] It was announced at the Google I/O conference on May 28, 2009.^[2][3]
Wave is a web-based computing platform and communications protocol designed to merge key features of communications media such as email, instant messaging, wikis, and social networking.^[4] Communications using the system can be synchronous or asynchronous. Software extensions provide contextual spelling and grammar checking, automated language translation^[3] and other features.^[5]
Initially released only to developers, a preview release of Google Wave was extended to 100,000 users in September 2009, each allowed to invite additional users. Google accepted most requests submitted starting November 29, 2009, soon after the September extended release of the technical preview. On May 19, 2010, it was released to the general public.^[6]
On August 4, 2010, Google announced the suspension of stand-alone Wave development and the intent of maintaining the web site at least for the remainder of the year,^[7] and on November 22, 2011, announced that existing Waves would become read-only in January 2012 and all Waves would be deleted in April 2012.^[8] Development was handed over to the Apache Software Foundation which started to develop a server-based product called Wave in a Box.^[9][10][11]
The project was discontinued on January 15, 2018.^[12]