mp3DirectCut is a fast and extensive audio editor for encoded MP3 and AAC. Without re-encoding directly cut, crop, split and join your tracks, create fades on MP3 and much more. Direct editing saves encoding time and preserves the audio quality of encoded tracks. The built in recorder creates MP3 on the fly. With Cue sheets, Pause detection or Auto cue you can easily divide long files.
LameXP is a free multi-format audio file converter that supports a variety of output formats, including MP3, AAC/MP4, Ogg Vorbis, Opus as well as FLAC, and that can read a multitude of input formats. It also supports multi-threaded batch processing.
GUI for 
MediaInfo, an OpenSource tool for displaying technical information about media files.
Alternatives: 
MediaInfo Lite, MediaInfo
HandBrake is a tool for converting video from nearly any format to a selection of modern, widely supported codecs.
Alternatives: 
StaxRip, 
XMedia Recode
Avidemux is a free video editor designed for simple cutting, filtering and encoding tasks. It supports many file types, including AVI, DVD compatible MPEG files, MP4 and ASF, using a variety of codecs. Tasks can be automated using projects, job queue and powerful scripting capabilities.
Alternatives: 
LosslessCut, 
VidCutter
Ant Renamer is a free program that makes easier the renaming of lots of files and folders by using specified settings. It supports Unicode names.
Alternatives: 
ReNamer, 
FileRenamer
The qBittorrent project aims to provide an open-source software alternative to µTorrent. Additionally, qBittorrent runs and provides the same features on all major platforms (FreeBSD, Linux, macOS, Windows).
Alternatives: 
Transmission, 
PicoTorrent
aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, SFTP, BitTorrent and Metalink.
Alternatives: 
uGet, 
Free Download Manager
NetSpot is an app for wireless site surveys, Wi-Fi analysis, and troubleshooting on macOS and Windows.
Alternatives: 
Acrylic Wifi, 
WifiInfoView
A unique, comprehensive, accurate & free Windows (and Linux/Wine) utility to determine the exact performance of local and remote DNS nameservers . . .
Alternatives: 
namebench
HWiNFO is a collection of professional hardware information and diagnostic tools supporting latest components, industry technologies, and standards.
Alternatives: 
CPU-Z + 
GPU-Z + 
PCI-Z + 
Windows System Information
PassMark DiskCheckup allows the user to monitor the SMART attributes of a particular hard disk drive. SMART (Self-Monitoring Analysis and Reporting Technology) is a feature on a computer's hard disk for providing various monitoring indicators of disk reliability. S.M.A.R.T. attributes: https://en.wikipedia.org/wiki/S.M.A.R.T.#ATA_S.M.A.R.T._attributes
Alternatives: 
CrystalDiskInfo, 
GSmartControl, 
HDDScan
WizTree is a hard drive disk space analyser similar to WinDirStat but is MUCH faster.
Alternatives: 
WinDirStat
Disk Cleanup is a computer maintenance utility included in Microsoft Windows designed to free up disk space on a computer's hard drive.
Alternatives: 
BleachBit
Hashing utility for verifying integrity of files using a wide range of supported algorithms: CRC32, MD2, MD4, MD5, SHA1, SHA256, SHA512, RipeMD128, RipeMD160, ED2K.
Alternatives: 
OpenHashTab, 
Hashtab
A text viewer application that has been carefully designed around its main task: viewing and presenting NFO files. It comes with three different view modes (Rendered, Classic and Text Only), export functionality and lots of options!
Alternatives: 
NFOPad
WinCDEmu is an open-source CD/DVD/BD emulator - a tool that allows you to mount optical disc images by simply clicking on them in Windows Explorer. If you have downloaded an ISO image and want to use it without burning it to a blank disc, WinCDEmu is the easiest way to do it.
Alternatives: 
ImgDrive, 
DAEMON Tools
TeamViewer is a comprehensive, remote access, remote control and remote support solution that works with almost every desktop and mobile platform, including Windows, macOS, Linux, Android, and iOS.
VirtualBox is a powerful x86 and AMD64/Intel64 virtualization product for enterprise as well as home use. Windows virtual machines for testing software are available at https://developer.microsoft.com/en-us/microsoft-edge/tools/vms/
Rufus is a utility that helps format and create bootable USB flash drives, such as USB keys/pendrives, memory sticks, etc.
Hiren’s BootCD PE (Preinstallation Environment) is a restored edition of 
Hiren’s BootCD based on Windows 10 PE x64. It includes the least, best and updated free tools used in Hiren’s BootCD. It is being developed for the new age computers, it supports UEFI booting and requires minimum 2 GB RAM. With the useful tools inside of the ISO, you can solve many problems related with your computer. It does not contain any pirated software, it includes only free and legal software.
Alternatives: 
SystemRescue
A malware cleaning tool that runs independent of the operating system from a CD, DVD, or a USB. It has direct access to the disc and the file system, and therefore is capable of removing the most persistent threats.
Alternative: https://ualinux.com/en/ubuntu-rescuepack
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