I've been into security for a long time. I don't use the dnms, but I browse this sub almost daily because I am a tor, encryption, infosec, and crypto currency enthusiast. Over my years I've written some CLI tools that I use for things like gpg, bitcoin management, etc. Most of them probably won't be too useful for people here as Tails has come a long way in usability. I have seen a lot of post about tumbling coins and obscuring the connection between bitcoin markets and dnm markets. Here are a couple from just today:
https://www.reddit.com/r/DarkNetMarkets/comments/3b7byw/to_mix_or_not_to_mix/
It's blatantly apparent that a lot of the people purchasing items around here have a very tenuous grasp of computering in general, but especially bitcoin/crypto. Which brings me to my point. Would anyone around here find it useful to have a CLI tool that works on tails for automating some bitcoin transfers and creating a plausible deniablility situation? I've been coding one for fun, but I'm a bit bored with it, and I wouldn't mind rewriting for use on tails os if there would be use for it.
If you are able and willing (Python), why not take a look and contribute to: https://github.com/chris-belcher/joinmarket/wiki
It's an actively developed P2P mixer (& tumbler) with built-in economic incentive for people to use it. (Those who provide liquidity get paid, not some central admin).
It's running the CoinJoin algorithm: trustless, decentralized, open source & secure (not one knows your input address & your output addresses, unlike the operator of a service who knows them exactly). View the orderbook http://joinmarket.io/
Its own subredit: https://www.reddit.com/r/joinmarket/