The website looks like it's either missing CSS or it's straight from the 90's. Maybe this is the intended style, but to me it looked like a very very old website. Super bright colors, serif fonts, not responsive, bad rounded corners, having links to SF (the myspace of code hosting sites) and W3schools (cf.
http://www.w3fools.com/), ...
To be constructive:
* Throw away the CSS and start fresh. Use something like Bootstrap, so you can get the basics right. Make sure it works on mobile, because that's where someone would gain the most from not having to type addresses but instead click buttons.
* Maybe show the favicons or screenshots of the website you are linking. Right now, it's just a long blob of buttons and without using my browser's search function, I'd have a hard time finding anything.
* Why do I need both a password AND a security code? Why can't I just login with email+password? On that note: The login form is suuuuper slow at the moment. Don't know if that is because I was giving invalid credentials and the site intentionally slows me down or what.
* http://www.osipage.com/dataExchange.php - I haven't tried, but this looks like I could send spam to anyone. Is this really what you want to allow visitors to do?
* When signing up, I had no idea that the two security code input fields are supposed to match each other. I thought I was supposed to enter something like ABC-123.
