Those working with language learners and linguistics/English majors may be interested to know that The Prime Machine has now been publically released.
It is a learner-friendly Windows app, drawing on ready-made online corpora or small DIY corpora.
It runs on Windows XP - Windows 10, and it is now available from its new website (www.theprimemachine.net), from 360 Store (China) and from the Microsoft Store (Windows 10 users only). Search for "The Prime Machine" (don't forget to use "The").
Wherever you get it, it is free.
It probably best suits language learners and undergraduate students who are getting started with DDL and concordancing, and it is hoped it adds an extra choice to the tools already available elsewhere. There are a range of moderately-sized ready-made corpora, including the subcorpora from the BNC, some fiction collections and collections of open academic journals.
The server is based in Suzhou, China.