Adobe teamed up with Echosign, an electronic signature service, a while back and now its hitting up the iPad and iPhone with all of the legally binding digital goodness in Echosign’s universal iOS app. Echosign allows you to send instant fax and e-signatures, track changes to contracts in real time, auto store and manage signed agreements, all with enterprise-grade security. Echosign has a number of different integrations, but this new iDevice option is pretty sweet. Download the iOS app for free and Echosign subscribers can attach their electronic signatures to any document within the app, along with the great sending and tracking features found in the full-service version. Echosign is no fly-by-night either – a lot of big names you might recognize rely on it for the contract execution and tracking efforts (Twitter, Google, Facebook, VMware, Dell, and Groupon, to name a few). So what are you waiting for? Get signing!