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April Alternatives
Similar projects and alternatives to april
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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Nim
Nim is a statically typed compiled systems programming language. It combines successful concepts from mature languages like Python, Ada and Modula. Its design focuses on efficiency, expressiveness, and elegance (in that order of priority).
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coalton
Coalton is an efficient, statically typed functional programming language that supercharges Common Lisp.
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nl-covid19-data-dashboard
Discontinued The dashboard provides information on the outbreak and prevalence of COVID-19 in The Netherlands
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Stream
Stream - Scalable APIs for Chat, Feeds, Moderation, & Video. Stream helps developers build engaging apps that scale to millions with performant and flexible Chat, Feeds, Moderation, and Video APIs and SDKs powered by a global edge network and enterprise-grade infrastructure.
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lisp-matrix
A matrix package for common lisp building on work by Mark Hoemmen, Evan Monroig, Tamas Papp and Rif.
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SaaSHub
SaaSHub - Software Alternatives and Reviews. SaaSHub helps you find the best software and product alternatives
NOTE:
The number of mentions on this list indicates mentions on common posts plus user suggested alternatives.
Hence, a higher number means a better april alternative or higher similarity.
april discussion
april reviews and mentions
Posts with mentions or reviews of april.
We have used some of these posts to build our list of alternatives
and similar projects. The last one was on 2024-12-14.
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Array Languages for Clojurians (2020)
Other work on integrating APL and lisp is here: https://github.com/phantomics/april
- Ask HN: 30y After 'On Lisp', PAIP etc., Is Lisp Still "Beating the Averages"?
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Arthur Whitney releases K source with MIT license
Try J or APL, K, BQN, or April, and be prepared to rethink how you implement solutions to problems you've tackled in other PLs. I am an array language user and fan. I have been playing with April and I use J regularly at home and sometimes for work when I can.
From the April github site: "April compiles a subset of the APL programming language into Common Lisp. Leveraging Lisp's powerful macros and numeric processing faculties, it brings APL's expressive potential to bear for Lisp developers. Replace hundreds of lines of number-crunching code with a single line of APL."
https://github.com/phantomics/april -
Thinking in an Array Language
There are attempts to combine those...
April (Array Programming Re-Imagined in Lisp)
https://github.com/phantomics/april
> operations that apply to the whole array
like MAP and REDUCE, higher order functions are not really new to Lisp. In Common Lisp they are extended to vectors.
> list languages and array languages are quite different.
There are some common things like interactive use, functional flavor, etc.
- April
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A Personal History of APL (1982)
There's also April APL: https://github.com/phantomics/april
Also the array language family seems to be stronger than ever with foss: ngn/k, BQN, uiua, and of course J but as you mentioned they're all different languages.
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The C juggernaut illustrated (2012)
I love J and APL, but April takes the cake for me[1]. APL in Lisp.
I also prefer SPARK2014 instead of Rust if I am not going to use C. I've started learning Rust a few times. SPARK2014 is easier to get going for me, and it has been used to produce high-integrity software and real-world applications for over a decade, and more if you include Ada from which it sprang[2].
[1] https://github.com/phantomics/april
[2] https://www.adacore.com/about-spark
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Erlang: The coding language that finance forgot
The one big use case was RabbitMQ in a messaging app, not HFT. I doubt Elixir even with Nx can compete with low-level HFT code. Python DL/ML code libraries are just wrappers around C too. Maybe if BeamAsm and Nx are used Elixir could be used for more numerical or not just distributed applications.
I've programmed in Python and Julia, and when I worked at an engineering (mechanical, entertainment engineering) company, Julia was great for its similarity to Matlab. I am a self-taught engineer, so I did not get pulled into Matlab in college.
Personally, I took to Erlang, so I could write plugins for Wings3D back in the early 2000s, but I never stuck with Erlang, or Wings3D (Blender3D was my choice and I even contributed to have it go opensource way back when). I like Erlang's syntax better for some reason, although Elixir's is beautiful too. I was not a Ruby programmer, and I had delved into Haskell and Prolog, so I think Erlang made more sense to me. I think Elixir has a lot more momentum behind it than Erlang, but at the root it's Erlang, so I think I'll stick with Erlang for BEAM apps. My favorite language is April[1] (APL in Lisp), and given my love of J, would be a better fit for any finance apps I might write. I am trying to convert some of the Lisp code in this book, "Professional Automated Trading: Theory and Practice" to April.
Maybe I'll write some equivalent Elixir code to compare.
[1] https://github.com/phantomics/april
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Learn Lisp the Hard Way
I'm also very curious for hear from expert lispers. I've tried to find the sweat spot where lisp would fit better than what I already know: shell for glue and file ops, R for data munging and vis, python to not reinvent things, perl/core-utils for one liners. But before I can find the niche, I get turned off by the amount of ceremony -- or maybe just how different the state and edit/evaluate loop is.
I'm holding onto some things that make common lisp look exciting and useful (static typing[0], APL DSL[1], speed [2,3,4]) and really want to get familiar with structural editing [5]
[0] https://github.com/phantomics/april - APL dsl
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The APL Programming Language Source Code (2012)
The 2 0 at the start of the APL line above controls the mirroring behavior. The second number can be set to 0 or 1 to choose which side of the image to mirror, while the 2 sets the axis along which to mirror. This will be 1 or 2 for a raster image but this function can mirror any rank of array on any axis.
April was used to teach image filtering in a programming class for middle-schoolers, you can see a summary in this video: https://vimeo.com/504928819
For more APL-driven graphics, April's repo includes an ncurses demo featuring a convolution kernel powered by ⌺, the stencil operator: https://github.com/phantomics/april/tree/master/demos/ncurse...
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A note from our sponsor - SaaSHub
www.saashub.com | 19 Jul 2025
Stats
Basic april repo stats
55
627
8.8
about 1 month ago
phantomics/april is an open source project licensed under Apache License 2.0 which is an OSI approved license.
The primary programming language of april is Common Lisp.
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