Programming language:   
donotationdsl alternatives and similar packages
Based on the "Control" category.

transient
A full stack, reactive architecture for general purpose programming. Algebraic and monadically composable primitives for concurrency, parallelism, event handling, transactions, multithreading, Web, and distributed computing with complete deinversion of control (No callbacks, no blocking, pure state) 
fusedeffects
A fast, flexible, fused effect system for Haskell 
apecs
a fast, extensible, type driven Haskell ECS framework for games 
recursionschemes
Generalized bananas, lenses and barbed wire 
distributedclosure
Serializable closures for distributed programming. 
classyprelude
Type classes for mapping, folding, and traversing monomorphic containers 
classypreludeyesod
Type classes for mapping, folding, and traversing monomorphic containers 
auto
Haskell DSL and platform providing denotational, compositional api for discretestep, locally stateful, interactive programs, games & automations. http://hackage.haskell.org/package/auto 
extensibleeffects
Extensible Effects: An Alternative to Monad Transformers 
selective
Selective Applicative Functors: Declare Your Effects Statically, Select Which to Execute Dynamically 
safeexceptions
Safe, consistent, and easy exception handling 
ComonadSheet
A library for expressing "spreadsheetlike" computations with absolute and relative references, using fixedpoints of ndimensional comonads. 
hask
Category theory for Haskell with a lens flavor (you need GHC 7.8.3, not 7.8.2 to build this!) 
abstractpar
Type classes generalizing the functionality of the 'monadpar' library. 
these
An eitherorboth data type, with corresponding hybrid error/writer monad transformer. 
transientuniverse
A Cloud monad based on transient for the creation of Web and reactive distributed applications that are fully composable, where Web browsers are first class nodes in the cloud 
cloudhaskell
This is an umbrella development repository for Cloud Haskell 
distributedfork
A distributed data processing framework in Haskell. 
distributedprocessplatform
DEPRECATED (Cloud Haskell Platform) in favor of distributedprocessextras, distributedprocessasync, distributedprocessclientserver, distributedprocessregistry, distributedprocesssupervisor, distributedprocesstask and distributedprocessexecution 
monadvalidate
(NOTE: REPOSITORY MOVED TO NEW OWNER: https://github.com/lexilambda/monadvalidate) A Haskell monad transformer library for data validation 
monadcontrol
Lift control operations, like exception catching, through monad transformers 
ixmonad
Provides 'graded monads' and 'parameterised monads' to Haskell, enabling finegrained reasoning about effects. 
effectmonad
Provides 'graded monads' and 'parameterised monads' to Haskell, enabling finegrained reasoning about effects. 
monadtime
Type class for monads which carry the notion of the current time. 
freereffects
An implementation of "Freer Monads, More Extensible Effects". 
operational
Implement monads by specifying instructions and their desired operational semantics.
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