debpatch
I write this program to help me patch Debian’s package and then build the package automatically. It can help you move your patches to debian/patches if it support this function, “prepatch” to source right after the source has been extracted, or “replace” files of the original package. Personally, I prefer patch it first to have the debian/patches support, and then my patches will be moved to that directory. What’s more, GPG signing is also supported.
The built packages will be placed in a specified directory. Add this directory to your sources.list and you can install it through apt-get! (You may want to use /etc/apt/preferences to help you control to priority, and crontab to build (if there is a later version) regularly).
You can get the source through subversion:
svn checkout http://opensvn.csie.org/debpatch/
Main page: http://victor.csie.org/debpatch/
This is my own repository. There are packages such as locales with cjk-width patched.
deb http://victor.csie.org/debian/ unstable debpatch