This single prim HUD is just a button that scrolls through nearby players names, photos and user key. Drop it in a prim and touch the prim and you are set to go. Modify it to suit your particular use in another Hud, weapon, or whatever you want.

// Basic Target Scanner HUD
// by Ackley Bing
//
// Drop this in a prim and touch
 
key HUDtarget;
integer HUDattachpoint=ATTACH_HUD_CENTER_1;
integer senseindex;
key photoReq;
 
TargetInfo(key id)
{
    llSetText(llToLower(llGetDisplayName(id))+"\n"+(string)id, <0.0, 1.0, 0.0>, 1.0);
    if ( id!=NULL_KEY )
    {
        photoReq=llHTTPRequest("http://world.secondlife.com/resident/" + (string)id, [], "");
        llOwnerSay("Current Target: secondlife:///app/agent/" + (string)id + "/inspect " + (string)id );
    }
    else
    {
        llSetTexture("8dcd4a48-2d37-4909-9f78-f7a9eb4ef903", 0);
        llOwnerSay("No Target");
    }
}
 
default
{
    state_entry()
    {
        llRequestPermissions(llGetOwner(), PERMISSION_TAKE_CONTROLS | PERMISSION_ATTACH);
    }
    attach(key id)
    {
        if (id)
        {
            llSetScale(<0.1, 0.15, 0.1>);
            llSetPrimitiveParams([PRIM_TYPE, PRIM_TYPE_BOX, PRIM_HOLE_DEFAULT, <0.0, 1.0, 0.0>, 0.0, <0.0, 0.0, 0.0>, <2 .0, 0.5, 1.0>, <0.0, 0.0, 0.0>, PRIM_ROT_LOCAL, <0.000000, -0.707107, 0.000000, 0.707107>, PRIM_COLOR, 0, <1 .0,1.0,1.0>, 1.0, PRIM_COLOR, 1, <0.0,1.0,0.0>, 1.0, PRIM_COLOR, 3, <0.0,1.0,0.0>, 1.0, PRIM_COLOR, 2, <1 .0,1.0,1.0>, 0.0, PRIM_COLOR, 4, <1 .0,1.0,1.0>, 0.0]);
            llRotateTexture(270.0*DEG_TO_RAD,0);
            HUDattachpoint=llGetAttached();
            senseindex=0;
            llSensor("", "", AGENT, 128, TWO_PI);
        }
    }
    on_rez(integer param)
    {
        if ( !llGetAttached() ) llRequestPermissions(llGetOwner(),PERMISSION_ATTACH|PERMISSION_TAKE_CONTROLS);
    }
    touch_start(integer tsn)
    {
        if ( !llGetAttached() ) llRequestPermissions(llGetOwner(),PERMISSION_ATTACH|PERMISSION_TAKE_CONTROLS);
        senseindex=senseindex+(llDetectedTouchFace(0)==1)-(llDetectedTouchFace(0)==3);
        llSensor("", "", AGENT, 128, TWO_PI);
    }
    sensor(integer num)
    {
        senseindex=((senseindex<0)*(num-1))+((senseindex>=0)*(senseindex*(senseindex!=num)));
        HUDtarget=llDetectedKey(senseindex);
        TargetInfo(HUDtarget);
    }
    no_sensor()
    {
        senseindex=0;
        HUDtarget=NULL_KEY;
        TargetInfo(HUDtarget);
    }
    http_response(key request_id, integer status, list metadata, string body)
    {
        if( request_id == photoReq )
        {
            string photoID;
            integer StartIndex=llSubStringIndex(body,"");
            if( StartIndex!=-1)
            {
                integer tempIndex=llSubStringIndex(body,"imageid")+18;
                if(tempIndex>17)photoID=llGetSubString(body,tempIndex,tempIndex+35);
            }
            if ( photoID==NULL_KEY || photoID=="" ) photoID="8dcd4a48-2d37-4909-9f78-f7a9eb4ef903";
            llSetTexture(photoID, 0);
        }
    }
    run_time_permissions(integer perms)
    {
        if ( perms & PERMISSION_ATTACH ) llAttachToAvatar(HUDattachpoint);
        if ( perms & PERMISSION_TAKE_CONTROLS ) llTakeControls(CONTROL_BACK, FALSE, TRUE); // required to allow script to continue to operate in 'no-script' areas and has to be activated before entering the 'no-script' area.
    }
}

default
{
    on_rez( integer param )
    {
        llResetScript();
    }
    
    state_entry()
    {
        llSay(0, (string)llGetPos());
    }

    touch_start(integer total_number)
    {
        llSay(0, (string)llGetPos());
    }
}

//
//    SHOP ZERO Tips25 AvatorDetector v1.0
//
//                   Created by Zero2000 Kid     2008/04/06
// 
 
integer input_ch = 34;
integer range=96;
integer handle;
string target;
string simname;
 
output_info (vector v , string name) {
    string pos=(string)v.x + "/" + (string)v.y + "/" + (string)v.z;
    llInstantMessage(llGetOwner(),name+"--> secondlife://"+simname+"/"+pos);
}
 
default {
    state_entry(){
        handle = llListen(input_ch,"",llGetOwner(),"");
    }
 
    on_rez(integer param){
        llResetScript();
    }
 
    listen(integer ch, string name, key id, string message) {
        target=message;
        simname=llGetRegionName();
        llInstantMessage(llGetOwner(),"Searching " + target + " ....");
        llSensor("", NULL_KEY, AGENT, range, PI);
    }
 
    sensor(integer total_number) {
        integer i;
        for (i = 0; i 
 

//  Basic Radar
//  Created by Water Rogers for IBM/Opensource
 
//  Purpose
//  --------------------------------------------------------------
//  This is a basic example of how you can create a simple radar
//  to detect Avatars within a given distance around the object
//  that this script resides in.  Names will be viewed above the
//  object along with distance (in meters).
 
//  Requirements
//  --------------------------------------------------------------
//  A single prim is all that is necessary for this example.
 
//  GLOBAL VARIABLES
//  --------------------------------------------------------------
 
float   g_Range     = 96.0;     //  The range of the sensor in meters
float   g_Arc       = PI;       //  The arc of the sensor
float   g_Rate      = 1.0;      //  The repeat rate of the sensor in seconds
vector  g_TextColor = <1 ,1,1>;  //  Text color <1 ,1,1> = White  
 
//  EVENTS
//  --------------------------------------------------------------
 
default
{
    state_entry()
    {
        //  ------------------------------------------------------
        //  This is the entry-point of the script.  After a script
        //  has been saved or reset, this event will fire off first
        //  ------------------------------------------------------
 
        //  We call llSetText() first to "clear" the text above the object
        //  passing an empty string into the text parameter.
        llSetText("", g_TextColor, TRUE);
 
        //  We then call the llSensorRepeat() function to start detecting
        //  avatars.  This function will raise the sensor() event handle
        //  at a rate of g_Rate seconds.
        llSensorRepeat("", NULL_KEY, AGENT, g_Range, g_Arc, g_Rate);
 
        //  Since we passed an empty string and key value to the sensor,
        //  this tells the sensor that we want to look for any name with
        //  any key as long as it's an AGENT, which is a fancy name for
        //  Avatar.  If we wanted to look for a specific person only, we
        //  could simply pass their name and/or key into these arguments.
    }
 
    sensor(integer num_detected)
    {
        //  ------------------------------------------------------
        //  This event will fire off at the rate of g_Rate in seconds
        //  after being called by either llSensor() or llSensorRepeat()
        //  ------------------------------------------------------
 
        //  First we start out by declaring a local variable "output". This
        //  variable will store information we want in a string until we
        //  are ready to display it at the end.
        string output;
 
        //  The next variable sets up the for loop
        integer x;
 
        //  This next section will loop through each one of the num_detected
        //  items properly sensed (in this case, it will be AGENTS or Avatars)
        //  and store the results into the output string.
        for(x = 0 ; x