I have created a public github repository that includes a number of popular open source C and C++ libraries that I have ported to android. The github page can be found here:
Currently, the following libraries are included:
-FreeImage - this is a more compact version of FreeImage that only includes support for BMP, GIF, ICO, JPEG, PCX, PSD, TIFF, PNG, and TGA filetypes.
-FreeSLW - port of Lukas Heise's OpenAL wrapper library, FreeSLW, that supports WAV and OGG Vorbis audio file loading and playback.
-GLU ES This is a port of the OpenGL GLU library to OpenGL ES. This port was not done by me, however I had to do a bit of tweaking to get it to compile for android.
-Lua - This was not done by me, however I thought I would include it here anyway since it can be a pain to find.
-Luabind - This one is my baby. I was not able to find this anywhere else and took a lot of hacking to make it work.
I will add more libraries as they come along and if anyone has one that they would like to contribute, please feel free to email me!