I've just written an answer on quaro for same question which is,
There is an app for that, we’ve built a service to get backups while deleting Slack Messages at onces, it deletes 100 messages for free and 2500 messages for just $1,
We will add Skype, Facebook, Instagram services in future, but for now we only have available deleting services for Slack,
For content management use headless cms. strapi and directus for the back end and front end using apis with react, jquery or static site generators like gatsby & jekyll. these are easy to maintain and most importantly they are fast. for resume / portfolio / blogs even large contain base site will work smooth in such JAM Stack. But none of them comes with ...
Although this question was asked three years ago, here's a few platforms we've come to appreciate over the years:
Workplace by Facebook - Facebook's entrant to the market
Discourse - for "civilised discussions"
Jive - enterprise player, been around for a while
Vanilla Forums - "forums reinvented"
Higher Logic - open source platform
Lithium - growing, ...
SQLite is a single-file database that may be suitable for your application. It has good support for SQL (it tracks Postgres pretty well), but is lacking stored procedures or functions. Its performance isn't comparable to client-server systems, but for a small low-load applications, it can be just fine.
The SQL.js library (https://github.com/kripken/sql.js)...