fSpy is a free and open-source application for quick and easy still image camera matching on Windows, Mac and Linux platforms, developed by Stuffmatic (Per Gantelius) from Sweden. It can calculate the properties (field of view, focal length, position and orientation) of the real camera from a photo, and transfer this data to the virtual camera of 3D software for use.

MatterControl is a free and open-source 3D printer control software for Windows, Mac and Linux platforms, developed by 3D printer retailer MatterHackers. It lets you design, organize, and manage your 3D prints. As the 3D printing market continues to heat up and become more competitive, its user base has been growing.

In this digital world, there are already too many traditional online file sharing services, but they are not secure (not anonymous or even transparent), free (various restrictions) or permanent (can delete your files or even shut down at any time, for any so-called reason) enough. Although Bit Torrent and its derivatives can share files freely, they are still not secure or convenient enough. So there is OnionShare, a good alternative to all online file sharing services.

Neat Download Manager (NDM for short) is a very practical universal file download manager and accelerator for Windows and Mac platforms (written in C++), developed by Javad Motallebi from United Arab Emirates. It is very similar to the famous IDM in all aspects, but has a cleaner interface and small file size (less than 1 MB), and it is completely free.

SpectraLayers is an advanced audio spectrum editing software for Windows and Mac platforms, developed by Steinberg Media Technologies from Germany. It was originally called Sony SpectraLayers, made by Sony Creative Software. In 2016, it was acquired by MAGIX, and in 2019 it was acquired by Steinberg.