Web/Cloud

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PaaS (platform as a service) cloud providers generally limit you to a fixed technology stack. However, OpenShift and Heroku allow third-party extensions, which can be used to support Haskell.

OpenShift

GHC version:	8.2.1
Author:	Gideon Sireling
Home page:	https://bitbucket.org/accursoft/haskell-cloud/
Documentation:	https://bitbucket.org/accursoft/haskell-cloud/src/default/README.md

The builder comes in several flavours, with just the network package or a pre-installed framework:

Framework	Builder
network	ghc-network
Yesod	ghc-yesod
MFlow	ghc-mflow
Scotty	ghc-scotty
Snap	ghc-snap

Heroku

GHC version:	7.10.3
Author:	Joe Nelson
Home page:	https://github.com/begriffs/heroku-buildpack-ghc
Documentation:	https://github.com/begriffs/heroku-buildpack-ghc/blob/master/README.md

Heroku-Haste

GHC version:	7.4.1
Author:	Alberto G. Corona
Home page:	https://github.com/agocorona/heroku-buildpack-haste
Documentation:	https://github.com/agocorona/heroku-buildpack-haste/blob/master/README.md

Heroku buildpack for tryhplay, incorporating Haste and HPlayground. Demo at http://tryplayg.herokuapp.com/.