fiblog

Free Panels:
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AlternC - http://www.alternc.org/   
ASM - http://www.acctmgr.com/
DTC  - http://www.gplhost.com/software-dtc.html
ISPConfig - http://sourceforge.net/projects/ispconfig/
SysCP -  http://www.syscp.org/
VHCS - http://www.vhcs.net/
Web-cp - http://www.web-cp.net/
Webmin - http://www.webmin.com/
VishwaKarma - http://kandalaya.org/vishwakarma.shtml
ZPanel - http://www.thezpanel.com  - Windows & Linux

Commercial panels with limited free version (not trial versions)
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ControlZx HMS - http://front.controlzx.com/  (renamed from Drzes).
DigiPanel - http://digipanel.com/
Parsv - http://www.parsv.com  - Windows
ServerCP - http://www.zervex.com/  - Linux
VirtualMin - http://www.webmin.com/index8.html  - addin module for webmin
CubePanel http://cubepanel.com/  - Windows & Linux

Commercial Panels
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Alabanza's CP - http://www.alabanza.com/www/docs/101
CPanel / WHM - http://www.cpanel.net/
Plesk - http://www.plesk.com/
Directadmin - http://www.directadmin.com/
H-Sphere - http://www.psoft.net/
iBizPanel - http://www.myibizpanel.com/
Interworx - http://www.interworx.com/
HELM - http://www.webhostautomation.com/
ZOMOS - http://www.zomos.com/
CP+ - http://www.cpplus.info/
InsPanel - http://www.inspanel.com/ - Windows
HostingAccelerator - http://www.hostingaccelerator.com/
Ensim - http://www.ensim.com/
Etrinix Corp - http://www.etrinix.com/
Webhost Panel - http://www.webhost-panel.com/ /
Hosting Controller - http://www.hostingcontroller.com/
HostFlow - http://www.hostflow.com/
Ravencore - http://www.ravencore.com/
XPanel : http://www.xpanel.com/
Cwipanel - http://www.cwipanel.com/  - Windows
DotNetPanel - http://www.dotnetpanel.com  - Windows