Making QR-code image having contact information (VCard) with Google Chart API. If you scan this image with mobile phone, you can directly add new person to your contacts.

gistfile1.fs

open System
open System.IO
open System.Net
open System.Drawing

let ImageSize = 300

let fetchImage (url : Uri) = 
    let req = WebRequest.Create (url) :?> HttpWebRequest
    use stream = req.GetResponse().GetResponseStream()
    Image.FromStream(stream)

let googleChartQRCodeImage mydata = 
    let addr = String.Format("http://chart.apis.google.com/chart?chs={0}x{0}&cht=qr&chl={1}&choe=ISO-8859-1", ImageSize, mydata)
    new Uri(addr, UriKind.Absolute)

let vcard = @"BEGIN:VCARD
VERSION:3.0
N:{1};{0};
FN:{0} {1}
NICKNAME:{2}
ORG:{3}
ROLE:{4}
TITLE:{4}
PHOTO;MEDIATYPE={6}:{5}
TEL;TYPE=CELL:{7}
X-TWITTER:{8}
URL:{9}
EMAIL;TYPE=PREF,INTERNET:{10}
ADR;TYPE=HOME:;;{11};{12};;{13};{14}
LABEL;TYPE=HOME:{11}\n{13} {12}\n{14}
REV:{15}
END:VCARD
"

let googleChartUri contact = 
    String.Format(vcard, contact)
    |> Uri.EscapeDataString
    |> googleChartQRCodeImage

let sample : obj [] = [|
    "Matt"; //first name 
    "Oneofus"; //surname
    "matias"; //nickname 
    "Company & co."; //organization
    "Guru"; //title
    "http://www.wpclipart.com/signs_symbol/icons_oversized/male_user_icon.png"; //image url
    "image/png"; //picture mime-type, eg. image/gif or image/jpeg
    "+358 50 123 4567"; //cell phone
    "Thoriumi"; // twitter account
    "http://www.iki.fi/thorium/"; // url
    "nospam@mailinator.com"; //email
    "Katuroad 1 A 5"; // street address
    "Espoo"; //city
    "02100"; //postal code
    "Finland"; //country
    System.DateTime.Now.ToString("yyyyMMddThhmmssZ"); // timestamp
    |]

open System.Windows.Forms
let showImage = 
    let form = new Form()
    let pb = new PictureBox()
    pb.Image <- sample |> googleChartUri |> fetchImage
    pb.SizeMode <- PictureBoxSizeMode.AutoSize
    form.Height <- ImageSize+50
    form.Width <- ImageSize+50
    form.Controls.Add(pb)
    form.Show()