RegKey Backup 

CT RegKey Backup is a handy utility for making backups of Registry keys and their sub keys. While it is not a Registry Editor it is an easy to use utility that restores keys that have been modified by programs or web sites.
key keys backup

ARPCache Viewer 

ARPCache is a secret, undocumented section of the registry used to store information for Add/Remove Program items in the latest versions of Windows. This tool allows you to see what is in your ARPCache and lets you remove items from it.
windows registry arpcache freeware add/remove programs

WinASO RegDefrag 

Speed-up your System. WinASO RegDefrag defragment and compact Windows registry with a few mouse clicks.
registry defrag speed-up system regdefrag registry compact

Tweak Manager 

Take complete control of your Windows system with access to hundreds of powerful tweaks and hidden registry settings.
tweak tweaks hacks tweaking manager master tweakui windows tweaks tweaker utility security tool

Acubix PicoBackup 

PicoBackup is an easy-to-use backup utility packed with many powerful features. There are plugins to backup files, Outlook/Outlook Express emails and Registry settings. Features integrated scheduler, CD/DVD burning, 256-bit AES/Blowfish encryption.
backup restore zip compress decompress encrypt encryption aes blowfish security dvd cd burning ftp

Emsa WinStartup Manager 

Emsa WinStartUp Manager is a tool that helps controlling programs that startup with your Windows. You can enable or disable any program that automatically runs at window startup, both through system registry settings or folders. Freeware.
startup manager startup programs registry editor startup folder autorun autorun at startup