Ultimaker Cura is a very popular, powerful and easy to use 3D printing & slicing application, created by David Braam from United States, but later developed and maintained by a 3D printer manufacturing company from Netherlands - Ultimaker and its community. The most important part is its very powerful open-source slicing engine. It can be used by anyone, whether an experienced or novice 3D printer user.

The biggest killer of disk space is not large files, but duplicate files, such as photos, music, videos, eBooks, documents, etc. Large files are actually quite easy to find and clean up, but duplicate files are almost always scattered all over the disk and usually hard to find. It is obviously too inefficient and even impractical to find them one by one by manually comparing the names, sizes, contents and other attributes of a large number of files.

We all know that APK is actually a compressed file package, so we can extract the files directly from the APK file using the file decompression software like 7-Zip, WinRAR. However, the XML files in the source files obtained in this way are encrypted and cannot be directly viewed. So we need to resort to some specialized APK decompilation tools.

Pligg (now called Kliqqi) is a free and open-source content management system (CMS) developed by yankidank (Eric Heikkinen) in 2005, based on PHP and MySQL. It offers a set of features that are similar to popular social publishing websites like Digg or Reddit, where users can submit and vote on news articles and connect with other users.

Fido (short for Full ISO Download) is a free and open-source Microsoft Windows ISO and UEFI Shell direct download address acquisition tool (script based app), developed by the same author of Rufus - Pete Batard from Ireland (written in PowerShell). It is originally designed to be used with Rufus, but can also be used to get direct download addresses of untouched and complete Windows ISO and UEFI Shell from Microsoft official servers.