If you have noticed WordPress 3.1 has built-in gallery that you can insert in posts or pages. It is not an option for Nextgen gallery but if you are looking for some simple gallery solution you can use this. As it is built-in so it will not take extra space.
When you insert an image using post editing panel you can select multiple images to upload. We normally use windows live writer to compose blog posts so this feature goes unnoticed.
When picture uploading is complete, do not forget to click on “save all changes’ in bottom side. After clicking on save all changes you will see gallery settings and a link for insert gallery.
You can make some settings as insert full image files or just picture thumbnails and gallery columns. I have created a picture gallery using inbuilt features of WordPress in this post.
The beautiful actress you see in this gallery is Asin Thottumkal. She is a south beauty. She is well-known for her role in Ghajini with Amir Khan.
The gallery has only 17 pictures but two more pictures you see in this gallery are weakness of this feature.
Disclaimer: These pictures are taken from internet on various sources, I have no copyrights.