Free DWG Viewer 5.3.0.2 Free DWG Viewer will open native DWG, DXF, and DWF files for viewing, along with accompanying Xref files. It will also open Informative
Calc 3D 0.0.31 Calc3D is a calculator for vectors, matrices, complex numbers, quaternions and coordinates.
For objects like point, line, plane and sphere
1st Choice FTPPro 8.74393 1st Choice FTPPro looks and feels just like Windows Explorer, except you can also transfer files to and from FTP sites.
Private Shell SSH Client 2.1 Private Shell is an advanced and easy-to-use SSH and SFTP client for Windows providing remote computer access with SSH1 and SSH2 protocols