readmanga

readmanga.com, A websites that provide manga scan for you to read it online, free. The sites using manga viewer 1.2 Alpha to let the user view available mangas without downloading it. The most popular series among all in this site is fullmetal alchemist.

List of manga:

Fullmetal Alchemist, Ichigo 100%, Katsu, H2, Hiatari Ryoukou, Kimi no Kakera, Yakitate!! Japan, Gakuen Heaven, Gintama.

My opinions:

(+) About this site:

1. Useful manga viewer 1.2 Alpha.
2. No registration needed to read any mangas.
3. No ads.
   
4. Request your favorite manga on the sites. I haven't try this one and I don't know whether they will respond it well or not.

(-) About this site:

1. Very limited numbers of mangas available.
2. Site update rarely occurs.

Recommended best for:

1. Online manga readers
2. Fast view manga online
   
3. Fullmetal alchemist fans
   

- Screenshot image taken from alexa.com