OoCities is described as 'Navigable archive of many former GeoCities.com websites. OoCities tried to save many GeoCities.com pages during the last days they were online from 20 to 27 October 2009, though were only able save a share of around 2 Million pages' and is a Web Archiving service in the education & reference category. There are four alternatives to OoCities, not only websites but also apps for a variety of platforms, including Android, iPhone, Android Tablet and iPad apps. The best OoCities alternative is Wayback Machine, which is free. Other great sites and apps similar to OoCities are Perma.cc, Geocities Archive and TheOldNet.
With the power of the Wayback Machine, you can go back in time to see how a website has changed and evolved through the history of the Web.
Wayback Machine is the most popular Web-based, Android, iPhone & iPad alternative to OoCities.
Wayback Machine is the most popular free alternative to OoCities.
Perma.cc is a service that helps anyone who needs to cite to the web create links to their references that will never break. Perma.cc prevents link rot.
GeocitiesArchive.org is a Geocities Archive / Mirror. It's a website dedicated to the memory of the early internet featuring full text search with Artificial Intelligence.
The Old Net is an attempt to restore vintage web browsing on vintage computers. It uses the Internet Archive: Wayback Machine API and a proxy that strips out any incompatible javascript and stitches together as many links as it can.
United States
It seems to have some of the archives from OoCities