History: Access Cards

In this project i was looking for any kind of an access card system for an office but open source there's a lot of alternative project which talk about this with more details me i am going just to present them to you so late start

ForkPi

A door access control system that is more accessible to the world. ForkPi stands for Fingerprint, OLED, RFID, Keypad, and Raspberry Pi.
What You'll Need:

1. A Raspberry Pi
2. Fingerprint Scanner: Fingerprint Scanner - TTL (GT-511C3)
3. RFID Scanner: PN532 NFC/RFID Controller Breakout Board
4. RFID Card: MiFare Classic (13.56MHz RFID/NFC) Card
5. Display: Monochrome SPI OLED Graphic Display
6. Keypad: Membrane 3x4 Matrix Keypad
7. Wires: Premium Female/Male Jumper Wires

Authentication Mechanisms

It supports five different authentication mechanisms involving three factors: RFID, fingerprint and PIN. The single-door access control provided by SpoonPi easily scales to multiple doors via the accompanying web app, ForkPi, which provides secure, centralized management of multiple SpoonPis over a local network.

for more details

wiegand-demo

This project implements a very common access control device. The LTPS is equipped with Tibbit #08 (clock/data and Wiegand interface). It gets card codes from an external RFID card reader. The project lets you save user names and their ID codes into the database, as well as verify the cards you read against the records of the database. When you read a card which ID code matches any ID code from the database, the terminal "grants access" (the blue LED turns on). If this ID code has no match in the database, the terminal "denies access" (the red LED turns on).
Some other distinctive features of this project:

The project utilizes a full-featured embedded SQLite SQL database engine.

1. The web interface shows card reader events in a real time.
2. This simple project demonstrates all main techniques that are important to building access control solutions with LTPS.

for more details