Actually, Automattic, the distributed company behind WordPress uses blogs (called p2s after the WP theme) for this. Each team has their own 'blog' and you can l

Actually, Automattic, the distributed company behind WordPress uses blogs (called p2s after the WP theme) for this. Each team has their own 'blog' and you can link them, comment, etc. Then there are company wide blogs with different topics, watercooler blogs, etc. Really useful to revisit past decisions and as a company wide knowledgebase. They even created a product out of it: https://wordpress.com/p2/ https://wordpress.com/p2/ Disclaimer: I work there, but on a different product.