Pajek 5.07 is available as a free download on our software library. Commonly, this program's installer has the following filename: Pajek.exe. The file size of the latest downloadable installer is 11.1 MB. This free software is an intellectual property of Vladimir Batagelj, Andrej Mrvar. Our built-in antivirus checked this download and rated it as 100% safe. The following version: 3.1 is the most frequently downloaded one by the program users. The program belongs to Internet & Network Tools.
From the developer:
Pajek , Pajek XXL and Pajek 3XL are program packages for analysis and visualization of very large networks (networks containing up to billion of vertices, there is no limit - except the memory size - on the number of lines). Pajek has been available since 1996. The program, documentation and supporting material can be downloaded and used for free for noncommercial use from its web page: http://mrvar.fdv.uni-lj.si/pajek/ In Pajek analysis and visualization of large networks are performed using six data types (objects): network (graph); partition (nominal or ordinal properties of vertices); vector (numerical properties of vertices); cluster (subset of vertices); permutation (reordering of vertices, ordinal properties); and hierarchy (general tree structure on vertices).
You may want to check out more software, such as Gephi or Social Network Visualizer, which might be similar to Pajek.