Display fusion - multi monitor setup helper but can be use on one monitor.
AIDA64 EXTREME - for hw monitoring.
Winautomation - special tool for automation everything.
WindowBlinds - for better style.
Adguard - best adblock.
VMware - virtual pc for virus testing and more.
ESET - best antivirus
Jdownloader 2 - best downloader
Wallpaper engine - if you work on background often you will like it (work well with display fusion)
Malwarebytes - best anti-malware
LASTPASS - help you with every login especialy usefull at ANDROID !

more tips in my profile ;)

CCleaner - free - clean up junkfiles
Mydefrag - defrag program - free - use monthly, get best result for regular hdd's
Idle Master - free - when you have a billion games in your library and want those cards/badges
Stylish - browser app - style changer for sites e.g. Youtube, Google, etc

Eset I.S Malwarebytes ocasionally.
unhider (SoftDesigner 2008) (unhides/brings to front "missing systray icon" programs )
File Shredder (fileshredderDOTorg)
processexplorer (Sysinternals)
ASF ASFUI :)
UniExtract (multi-purpose archive extractor or resource unpacker ,ie: exe files)
xsearch (much better than win search ,for me anyway)
Testdisk-7.1
RevoUninstaller Pro
SuperF4 (unlocks frozen games and kills the process ,via hotkey shortcut or mouse)
Flux (Removes glare from screen/changes colour to diff. grades of sunlight if wanted)
Notepad
Quicksfv
HashCheck Shell Extension
Jdownloader 2 IDM (the only 2 you'll ever need for downloading).

Video, ie:mkv/mp4 editing compression/converting:
mkvtoolnix-x64 (can edit /add/remove all sorts of things in an mkv file)
MeGUI (can convert huge video file to small mkv)

Nice!

I always loved this music visualizer, it's called G-force for Soundspectrum. I always bought the gold edition. You can customize to your heart's content too.

https://www.soundspectrum.com/g-force/