Since you clicked the link to get here, you most likely are a developer with C/C++ knowledge and wonder how to start contributing to the Geany project? You will find a short introduction here on how to start.
The first step is to introduce yourself so that we know you are there. Begin with subscribing to the mailing lists if you haven't done yet. Then write us a short mail to the Geany-devel mailing list and introduce yourself. We do not require any specific information about you. You decide what you will tell us.
Before you begin hacking on Geany, you should have a look on the HACKING file. Important things about coding style and many more are written down there. If you would like to contribute to current Git version of Geany, you should choose the current development version of the HACKING file available here.
There is a bug tracker at  which may contain bug reports or even feature requests which may already have a patch attached. To avoid redundant efforts, it's always a good idea to have a look first to see if there is already anything concerning the topic you want to work on.
There are also mailing lists archives where you can find out if topics have already been discussed. It's a good idea, to have at least a quick look there too. You can find them here:
There are a few different points where you can step in and begin developing and improving Geany.
You can fix any bug you found in the issue tracker and either send a patch to the Geany-devel mailing list or attach the patch directly to the concerning bug. If you have an account om GitHub, you may also fork us and open a pull request accordingly.
Take a feature you found on the issue tracker and decide if it is a feature which should be implemented in the Geany core or if it is better that it is implemented as a plugin. If you're not sure, you can discuss this on the Geany-devel mailing list. When you have decided to implement the feature in the Geany core, go ahead and clone or update the current Git master of Geany, implement your feature and send us a patch to the Geany-devel mailing list or attach a patch to the concerned request on the issue tracker. You can also open a pull request as well if you're on GitHub, of course.
You can find a wishlist of plugin features wished for by users at  or even implement your own plugin wish. Note that the wishlist just contains wishes for plugins and shouldn't contain a wish for a core feature. Those should go to the issue tracker of Geany. If you find any wish of which you think may be better realized in the Geany core, feel free to add it to the feature tracker, but don't forget to add a hint that this wish is also listed in the plugins wishlist.
If you're going to write a plugin it would be cool if you write your README file in restructuredText. It can automagically be used for the plugins.geany.org website then.
When you like contributing to the Geany project and have fun with implementing things for Geany, you can even dive deeper.
You can find Geany on GitHub at https://github.com/geany. A repository for Geany-Plugins can also be found there. Feel free to anonymously clone the repositories, change the code, diff it and send us the patches or even better - if you have an account at GitHub - fork it there and open a pull request for your changes.