MJ12node 1.7.7 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The software lies within Internet & Network Tools, more precisely Network Tools.
The most popular versions of the software are 1.7 and 1.6. This free software was originally produced by Majestic-12 Ltd (UK). The common filename for the program's installer is MJ12node.exe. We recommend checking the downloaded files with any free antivirus.
From the developer:
Majestic-12 is working towards creation of a World Wide Web search engine based on concepts of distributing workload in a similar fashion achieved by successful projects such as SETI and distributed.net. The project was founded in late 2004 by Alex Chudnovsky. Majestic-12 is developing a search engine scalable to billions of web pages that is based on support by the community.
You may want to check out more software, such as PageScope Network Setup or Inspyder InSite Trial, which might be similar to MJ12node.