Signature Chain (SIGN) is a fairly new project that has started in September 2018.
SIGN is a token that has been made on the WAVES Platform. When SIGN first started it consisted of 3 team members. All were anonymous and it seemed very sketchy. Later on in the project a new developer joined in named Christophe Verdot. He and the rest of the team have since then gone fully public and have given linkedin profiles etc. Also a couple months after him joining a new marketing manager joined the team named Kristine. In short, the project was sketchy. It has developed rather quickly with 4 functions running on mainnet already. (File certification, Chat certification, E-Mail certification and desktop wallet). They also have side projects creating them funding like a service where waves projects can purchase a web wallet from them. Soon they will also be releasing a digital art market with all art being certified on their blockchain. 2 days ago they also released a new 49+ page whitepaper, along with partners, new faces and new plans.

This project is a project that focuses on document certification on the blockchain. Any digital file will be able to be certified through timestamping. One of their unique features (already out by the way) is E-Mail certification in which people can certify the authenticity of an email that has been sent. This project has been officially recognized by the Waves Platform and have been given multiple "grants" by the Waves Labs team.

Sasha Ivanov the CEO of the Waves Platform has also officialy recognized Signature Chain multiple times.

Signature Chain already has multiple working products and has partners. This project is only a $100k marketcap, if you don't see the potential in this project then I don't know how to save you. This token is listed at 2 exchanges: Waves and STEX.com.

Here is some of the latest news:
Lead developer Christope Verdot officially joined the Waves Platform team to manage and hosts events in the Phillipines
49+ page whitepaper released 30 september 2019
New parter also announced 30 september 2019
3 new faces joined the project also 30 september 2019

Check out the website and whitepaper or twitter. See for yourself. This project is developing rapidly with WAVES helping in funding and marketing. This project is 100% going to blow up in the next bull run. Load up while it is cheap.

Real life adoption is also starting to happen slowly, check out Joey Gates on twitter for example, a digital artist using the SIGN blockchain to certify his digital art. He even went to the Utah arts gallery and showed off his SIGN certified art with a certificate.

TIDEX token on Waves in the last few months went 100x, this should prove that the Waves platform is not limitting anything. Perhaps SIGN is the next 100x on Waves platform.