类库

1. libcurl: http://libcurl.org/
2. libjpeg: http://www.ijg.org/
3. libopenjpeg: http://www.openjpeg.org/
4. libtiff: http://zh.wikipedia.org/zh/LibTIFF , http://www.remotesensing.org/libtiff
5. libpng: http://www.libpng.org/
6. zlib: http://www.zlib.net/
7. cairo: http://cairographics.org/
8. glibc: http://www.gnu.org/software/libc/