Google Sites is a structured wiki- and Web page-creation tool offered by Google. The declared goal of Google Sites is for anyone to be able to create simple web sites that support collaboration between different editors.
People often use Product Hunt to search for their next personal or work tool. Encourage your community to leave reviews on Product Hunt — they play a key role in helping users to discover (ooh, SEO!) and select your product.
Use website badges to encourage your community to follow you on Product Hunt. They're easy to embed on your homepage or footer, and subscribers can keep track of future product updates.