Appsell - Boost sales using product upsell & cross-sell funnels Using AppSell, you can increase your store average order value and revenues significantly with the easiest-to-use Wix store upsell builder app. You can change the design to match the style of your Wix storefront with just a few clicks! AppSell will help you to sell more to the same customer by easily customizing your cart, checkout and post-purchase... - Source: Hacker News / over 2 years ago

Apache Karaf with OSGi works pretty nice using annotation based dependency injection with the declarative services, removing the need to mess with those hopefully archaic XML blueprints. Too bad it's not as trendy as spring and the developers so many of the tutorials can be a bit dated and hard to find. Karaf also supports many other frameworks and programming models as well and there's even Red Hat supported... Source: about 3 years ago