When you run into issues with your Odoo installation or you have questions about specific features, one of the best resources available is the official Odoo help forum. On that site you can search for questions and if your specific question has not been addressed, you can then ask your own question. This has become a very active forum and is worth a visit if you need help with a problem.
The Odoo Community Association (OCA) is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use. The OCA is committed to providing resources and legal support to the Odoo community and insuring that Odoo remains both open source and maintained for the public benefit.
Odoo 10.0 is typically downloaded in a format that already comes with many applications and modules available for installation. However, there are many more modules in the online repository. If you are thinking about making any customizations in Odoo, check this link to make sure someone else has not already done the work for you:
Here you can browse for modules by the application they are associated with and even filter out applications by the version number of Odoo you require. Starting with Odoo 9, there are now paid applications in the library as well as free offerings.
This link will take you directly to the Odoo 10 release notes:
Odoo branches are maintained on GitHub. The primary Odoo project is located at: