for starters, these are all good for windows 7 (i use them) and all are free: Mozilla Firefox, Google Chrome, Google Talk, Microsoft Security Essentials, Picasa, Malwarebyte's Anti-Malware, Wise Registry Cleaner, Wise Disk Cleaner, Ccleaner, Sysinternals Process Explorer, CDBurnerXP, VLC Media Player, Alarm Clock of Justice, The Sage, Youtube Downloader, Audiograbber, WinAmp, Media Monkey, Speccy, Currports, ESET Online Scanner, GIMP, Helios Paint, Soluto, Facebook Messenger, Speedfan, BatteryInfo, XPS Viewer, Auslogics Disk Defrag, Notepad++, Skype, SlimComputer, Unlocker, Wise Folder Hider and Wise Registry Cleaner to name a few...