From article http://www.vkalchev.co.uk/content/quickinstallapk/ Spoke to Val and he clarified the Licensed under the Apache License, Version 2.0

QuickInstallScript.sh

#!/bin/bash
#Licensed under the Apache License, Version 2.0 (the "License");
#you may not use this file except in compliance with the License.
#You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
#Copyright 2013 Valentin Kalchev 
#Date: 26/02/2013
#Target: Mac OS X Terminal + Android ADB + AAPT

sharePackageName=""

#Called when user selects the Install (1)
function Install
{
	echo --------------------------------------------
	echo --------------------------------------------
		echo Select .apk to Install it on all devices...
	echo --------------------------------------------
	a=`ls *.apk`
	INSTALL_OPTIONS="Back $a"
	
	select install_opt in $INSTALL_OPTIONS; do
		for item in $a;do
			case $install_opt in
        		"$item")
        		#Uninstall app before installing
        		
				echo --------------------------------------------
					echo $item is being uninstalled from all devices...
				echo --------------------------------------------
        		UninstallApp $item
        		
				echo --------------------------------------------
					echo $item is being installed on all devices...
				echo --------------------------------------------
        		#Install the app 
        		InstallApp $item
        		
				echo --------------------------------------------
					echo $item is being launched on all devices...
				echo --------------------------------------------
        		#Find the Launch Activity and start the app on all devices
        		FindLaunchableActivity $item
            break;;
            "Back")
            	MainMenu
            break;;
    		esac
        done
    done
}


#Function to be called to install the app on the device
function InstallApp
{	
	for device in `./adb devices | awk 'NR>1 {print $1}'` ;do
    	./adb -s $device install $item
	done
}

#Called when user selects the Uninstall (2) 
function Replace
{
	echo --------------------------------------------
	echo --------------------------------------------
		echo Select .apk to Replace it on all devices...
	echo --------------------------------------------
	a=`ls *.apk`
	REPLACE_OPTIONS="Back $a"
	
	select replace_opt in $REPLACE_OPTIONS; do
		for item in $a;do
			case $replace_opt in
        		"$item")
        		
				echo --------------------------------------------
					echo $item is being replaced on all devices...
				echo --------------------------------------------
        		ReplaceApp $item
            break;;
            "Back")
            	MainMenu
            break;;
    		esac
        done
    done
}
function FindActivity
{
	a=`ls *.apk`
	FINDACTIVITY_OPTIONS="Back $a"
	
	select replace_opt in $FINDACTIVITY_OPTIONS; do
		for item in $a;do
			case $replace_opt in
        		"$item")
        		FindLaunchableActivity $item
            break;;
            "Back")
            	MainMenu
            break;;
    		esac
        done
    done
}
function FindLaunchableActivity
{
	#Create string with name of the command and .adb inside it
	aaptCommand="./aapt d badging "
	grepCommand=" | grep 'pack'"
	packageName=${aaptCommand}${item}${grepCommand}
	
	recordingPackageName=""
	startRecordingBoolean=false
	loopString=`$packageName`
	
	incrementLoop="0"
	
	record=false
	
	#Trim the amount of text that needs scanning
	for packageChar in $loopString;do
		#If the line equals package name - store into the variable
		if($record);then
			recordingPackageName=$packageChar
			record=false
		fi
		case "$packageChar" in 
  				"launchable-activity:")
    			record=true
    	;;
    	esac
		incrementLoop=$[incrementLoop+1]
	done
	
	#String to look for starting the expression 
	compString="'"
	
	#String that will store the package name
	packageName=""
	
	#Check each character
	for (( i=0; i<${#recordingPackageName}; i++ )); do
  		curString=${recordingPackageName:$i:1}
  		
  		if($startRecordingBoolean);then
  		
  			#When recording if character hits the second ' - exit the if statement
  			case "$curString" in 
  				"$compString")
    			startRecordingBoolean=true
			break
    		;;
    		esac
    		
    		#Save each character between both '
  			packageName=$packageName${recordingPackageName:$i:1}
  		fi
  	
  		#Start recording if character equal '
  		case "$curString" in 
  			"$compString")
    		startRecordingBoolean=true
    	;;
		esac
  	done
  	
	for device in `./adb devices | awk 'NR>1 {print $1}'` ;do
		./adb -s $device shell am start -n $sharePackageName/$packageName
	done
}

function ReplaceApp
{
	for device in `./adb devices | awk 'NR>1 {print $1}'` ;do
    	./adb -s $device install -r $item
	done
}

#Called when user selects the Uninstall (3) 
function Uninstall
{
	echo --------------------------------------------
	echo --------------------------------------------
		echo Select .apk to Uninstall it on all devices...
	echo --------------------------------------------
	a=`ls`
	UNINSTALL_OPTIONS="Back $a"
	
	echo --------------------------------------------
	select uninstal_opt in $UNINSTALL_OPTIONS; do
		for item in $a;do
			case $uninstal_opt in
        		"$item")
        		
				echo --------------------------------------------
					echo $item is being uninstalled from all devices...
				echo --------------------------------------------
        		UninstallApp $item
            break;;
            "Back")
            	MainMenu
            break;;
    		esac
        done
    done
}

function UninstallApp
{
 	#Create string with name of the command and .adb inside it
	aaptCommand="./aapt d badging "
	grepCommand=" | grep 'pack'"
	packageName=${aaptCommand}${item}${grepCommand}
	
	
	recordingPackageName=""
	startRecordingBoolean=false
	loopString=`$packageName`
	
	incrementLoop="0"
	
	#Trim the amount of text that needs scanning
	for packageChar in $loopString;do
		#If the line equals package name - store into the variable
		if [[ $incrementLoop -eq 1 ]];then
			recordingPackageName=$packageChar
		fi
		incrementLoop=$[incrementLoop+1]
	done
	
	#String to look for starting the expression 
	compString="'"
	
	#String that will store the package name
	packageName=""
	
	#Check each character
	for (( i=0; i<${#recordingPackageName}; i++ )); do
  		curString=${recordingPackageName:$i:1}
  		
  		if($startRecordingBoolean);then
  			#When recording if character hits the second ' - exit the if statement
  			case "$curString" in 
  				"$compString")
    			startRecordingBoolean=true
    		break
    		;;
    		esac
    		
    		#Save each character between both '
  			packageName=$packageName${recordingPackageName:$i:1}
  		fi
  		
  		#Start recording if character equal '
  		case "$curString" in 
  			"$compString")
    		startRecordingBoolean=true
    	;;
		esac
  	done
  	
  	sharePackageName=$packageName
  	#Uninstall from each device using the package name
  	for device in `./adb devices | awk 'NR>1 {print $1}'` ;do
  	
  		recordModel=false
  		model=""
  		
		deviceModel=`./adb -s $device shell cat /system/build.prop | grep "model"`
  		for (( i=0; i<${#deviceModel}; i++ )); do
  		
  			curString=${deviceModel:$i:1}
  			
  			if($recordModel);then
  				model=$model$curString
  			fi
  			
  			case "$curString" in 
  				"=")
    			recordModel=true
    		;;
    		esac
  		done
  		
  		
  		echo "Uninstall status for" $model...
      	./adb -s $device uninstall $packageName
	done
}

function InstallAll
{
	a=`ls *.apk`
	
	for item in $a;do
		echo --------------------------------------------
		echo $item is being installed on all devices...
		echo --------------------------------------------
		
		#Uninstall app before installing
 		UninstallApp $item
        		
		#Install the app 
        InstallApp $item
	done
	
	#Go back to the Main Menu
	MainMenu
}

function UninstallAll
{
	a=`ls *.apk`
	
	for item in $a;do
		echo --------------------------------------------
		echo $item is being uninstalled from all devices...
		echo --------------------------------------------
		#Uninstall app before installing
 		UninstallApp $item
	done
	
	#Go back to the Main Menu
	MainMenu
}

function ReplaceAll
{
	a=`ls *.apk`
	
	for item in $a;do
		echo --------------------------------------------
		echo $item is being replaced on all devices...
		echo --------------------------------------------
		#Uninstall app before installing
 		ReplaceApp $item
	done
	
	#Go back to the Main Menu
	MainMenu
}
#Create Main Menu function with options to choose from
function MainMenu
{
	OPTIONS="Install Replace Uninstall InstallAll ReplaceAll UninstallAll Quit"
	
	echo --------------------------------------------
		echo Main Menu - Select one of the options...
	echo --------------------------------------------
    select opt in $OPTIONS; do
            if [ "$opt" = "Quit" ]; then
                exit
            elif [ "$opt" = "Replace" ]; then
                Replace
            elif [ "$opt" = "Install" ]; then
               	Install
            elif [ "$opt" = "Uninstall" ]; then
               	Uninstall
            elif [ "$opt" = "InstallAll" ]; then
               	InstallAll
        	elif [ "$opt" = "ReplaceAll" ]; then
               	ReplaceAll
            elif [ "$opt" = "UninstallAll" ]; then
               	UninstallAll
            elif [ "$opt" = "Test" ]; then
               	Test
            else
                clear
                echo bad option
            fi
    done
    
}    

function Test
{
	for device in `./adb devices | awk 'NR>1 {print $1}'`;do
		echo $device
	done
}
#Call the Main Menu function
MainMenu