Free software that is recommended by RPCH:

SOFTWARE FOR COMPUTERS:

Antivirus:
Microsoft's free Antivirus - Windows Defender (already installed on windows 10 machines)

AntiMalware:
Malwarebytes (Uncheck the free 14 day trial, all you need is the free version)
AdwCleaner by Malwarebytes - cleans up lots of junkware
Spybot Search & Destroy
SuperAntiSpyware

One Time Scanners:
Microsoft Safety Scanner
Microsoft Malicious Sofware Removal Tool 32 bit (Already installed if you get window's updates.)
Microsoft Malicious Sofware Removal Tool 64 bit (Go to "start" and type in "mrt" to run.)
Malwarebytes Junkware Removal Tool

System tools:
Glary Utilities
CCleaner
CoreTemp
Windows Repair Toolbox - Almost everything you need to repair windows problems in one small handy tool

Rootkit remover:
GMER
TDSSKiller
Microsoft System Sweeper

Windows master boot record checker:
MBRCheck.exe detector from geekstogo
GMER's detector
Avast's detector

Think you have a rogue security program installed? Click HERE for current list.

Windows Vista, 7, 8, 10 firewall:
Windows 7 firewall

Web Browser:
Firefox
Chrome
Safari

Web Password Manager:
LastPass

Remote Assistance:
Teamviewer (free for personal use)

Video & Audio Player (this play almost everything)
VLC Player

Skype:
Call Recorder

Windows & Office key viewer:
Produkey (not on current install of windows?... registry hive file is located in c:\windows\system32\config\software) (only works up to 2010)
Office 2013 key - might find here: \HKEY_LOCAL_MACHINE\software\Microsoft\Office\15.0\ClickToRun\scenario\INSTALL [REG_SZ] 
or here: HKLM\SOFTWARE\Microsoft\Office\15.0\ClickToRun\propertyBag
Belarc
pkeyui (windows)
Check your key - The Ultimate PID Checker
Download your version of office 2007 HERE or HERE
Download your version of office 2010 HERE
Download your version of office 2013 HERE
Download your version of Windows 8 (Retail only) GUIDE - Download
Download your version of Windows 8 (OEM only) Guide
Download links have been removed. Try getting it from MS using your key: HERE

Windows 10 (Downloader and install media creator)
Need the option to override pro/home with clean install? Click HERE to find out how.

Windows 7 wont update after clean install? Click HERE.

QuickBooks:
To get your License & Product #, run the program and press "F2"
Downloads

Windows program uninstallers:
Revo Uninstaller

Email Password finder
NirSoft MailPassView (Outlook, Windows Live Mail)
EseDbViewer (Windows Live Mail Contacts.edb viewer)

Disposable Email
mailinator.com - Just send the email to anything@mailinator.com and check it at mailinator.com.

File unlocker:
Unlocker (your antivirus might flag this as a virus, its not)
PowerRun (Run programs as TrustedInstaller to allow changing locked registry keys)

Make a multiboot USB flash drive:
Yumi

Make any program portable:
Cameyo

Wi-Fi scanning software
inSSIDer

Share one keyboard and mouse with multiple computers:
Synergy (Works great if you have a media center PC and you use a laptop while you watch TV)

View entire IE history
IEHistoryView

Restore Windows 7 file extension type associations:
sevenforums.com

System Information
Speccy

Manage/check programs that start automatically with windows
Autoruns

APPS FOR SMARTPHONES:

Music Streaming on your smart phone:
Pandora
Tunein Radio (has most FM stations & Internet stations)

Receive and Respond to your text messages from your computer - also shows you who is calling (Android only)
Mighty Text

Share your real time location, destination and estimated time of arrival
Glympse

Locate or Sound Alarm on your phone from a website
Lookout

Save YouTube videos for offline viewing:
Clipgrab (Make sure you click "Custom installation (advanced)" and uncheck any 3rd party software)

Ninite - Install many popular apps at once or just to avoid installing crapware and toolbars, use this.

KODI (new XBMC)
KODI Addon Installer