1)I like wget, which I use in the commands below. To start compile that or replace the wget

command with curl -O.

curl -O http://ftp.gnu.org/gnu/wget/wget-latest.tar.gz
tar -zxvf wget-latest.tar.gz
cd wget-1.11/
./configure --prefix=/usr/local
make
sudo make install
cd ..

2)FreeType
wget http://download.savannah.gnu.org/releases/freetype/freetype-2.3.5.tar.gz
tar zxvf freetype-2.3.5.tar.gz
cd freetype-2.3.5
./configure --prefix=/usr/local
make
sudo make install
cd ..

3)PNG Library

http://sourceforge.net/projects/libpng/files/libpng15/1.5.1oldbetas/ and download libpng-1.5.1
tar -zxvf libpng-1.2.25.tar.gz
cd libpng-1.2.25
./configure --prefix=/usr/local
make
sudo make install
cd ..

4) Download JPEG Library

5)TIFF Library

wget ftp://ftp.remotesensing.org/libtiff/tiff-3.8.2.tar.gz
tar -zxvf tiff-3.8.2.tar.gz
cd tiff-3.8.2
./configure --prefix=/usr/local
make
sudo make install
cd ..

6)ImageMagick

wget ftp://ftp.imagemagick.org/pub/ImageMagick/ImageMagick.tar.gz
tar zxvf ImageMagick.tar.gz
cd ImageMagick-6.3.9/
export CPPFLAGS=-I/usr/local/include
export LDFLAGS=-L/usr/local/lib
./configure --prefix=/usr/local  --disable-static --with-modules --without-perl

--without-magick-plus-plus --with-quantum-depth=8

--with-gs-font-dir=/usr/local/share/ghostscript/fonts

make
sudo make install
cd ..

7)RMagick

sudo gem install rmagick

8)MiniMagick

sudo gem install mini_magick