OTRS and Request Tracker (RT) are popular for this.  Its been a while since I used either, so alot could have changed, but you can have a look at them.

On 4 Mar 2014 15:30, "patrick kinyua" <rickinyua@gmail.com> wrote:
Hello guys,

Any advice on the above would be highly appreciated.
I am thinking of either Help Desk Lite, PHP Help Desk or osticket. Anyone who has worked on either on any other kindly advice.

Kind Regards,
Patrick Kinyua.
Web and Systems Developer.
+254 718 860 185

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