Overview:

Tracks players points according to events.
Completely configurable events and rewards.
Completely configurable menus, able to use any client/server command.
Supports both MySQL and SQLite

Cvars:

This plugin doesn't have a terribly large number of Cvars, most configuration is done through the keyvalue configs. 

merx_version - Either the current build number or CUSTOM for a hand-compile.
merx_default_points - Sets the default number of points to give new players.
merx_save_timer - Sets the duration between automatic saves.

Commands:

sm_points - Displays your current points.
sm_merxmenu - Displays the points menu.
giveitem -(cheat) Give client an item.

Installation:

Grab the latest build from: http://ci.0xf.org/job/Merx/lastBuild/
Copy /addons/ in the zip to /addons/ on your server (if updating, beware of overwriting your existing configurations)
(Optional) Navigate to the /configs/ directory
(Optional) Add an entry for merx in the databases.cfg file
(Optional) Navigate to the /merx/ directory
(Optional) Modify the events for your game. Event files are in the format <gamedir>.events.txt
(Optional) Modify the menus for your game. Menu files are in the format <gamedir>.<team>.menus.txt
Start the server 

Configuration:

Events:
	// Name of the event to hook
	"player_death"
		{
			// Message to be sent to the selected client(s)
			"format"            "You earned {olive}2{default} points for killing %N."
			// Event keys to use in the format
			"formatkeys"
			{
				// Key is the event key, value is the field type
				//     Use %d for short, byte or long
				//     Use %f for float
				//     Use %b for bool
				//     Use %s for string
				// Additional field types
				//     Any field that has a client (userid, attacker, victim, etc) can use the client fieldtype
				//    Use %N or %L for clients
				//    Any field that has a team number (winner) can use the team fieldtype
				//    Use %s for teams
				// Additional information can be found at: http://wiki.alliedmods.net/Format_Class_Functions_%28SourceMod_Scripting%29
				"userid"        "client"
			}
			// If this format string is a translation string, set this to 1
			"translated"        "0"
			// This is the target to be rewarded for completing this event
			"rewardtarget"        "attacker"
			// Do NOT reward the target if this field matches the target field
			"rewardifnotequals"    "userid"
			// Reward the player's entire team for completing this event
			"rewardteam"        "0"
			// The amount of points to reward the player
			"reward"            "5"
			// Whether to notify all players or just the players being rewarded
			"notifyall"            "0"
		}

Important Links:

Github: http://github.com/necavi/merx/
Jenkins: http://ci.0xf.org/job/merx/
Latest Build: http://ci.0xf.org/job/Merx/lastBuild/
Original Inspiration: https://forums.alliedmods.net/showthread.php?t=110229
List of Source events: http://wiki.alliedmods.net/Game_Events_%28Source%29