spf VS zeptoforth

Compare spf vs zeptoforth and see what are their differences.


SP-Forth (by rufig)


A not-so-small Forth for Cortex-M (by tabemann)
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spf zeptoforth
3 11
39 103
- -
0.0 9.6
about 2 months ago 2 days ago
Forth Forth
- MIT License
The number of mentions indicates the total number of mentions that we've tracked plus the number of user suggested alternatives.
Stars - the number of stars that a project has on GitHub. Growth - month over month growth in stars.
Activity is a relative number indicating how actively a project is being developed. Recent commits have higher weight than older ones.
For example, an activity of 9.0 indicates that a project is amongst the top 10% of the most actively developed projects that we are tracking.


Posts with mentions or reviews of spf. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2022-07-02.


Posts with mentions or reviews of zeptoforth. We have used some of these posts to build our list of alternatives and similar projects. The last one was on 2023-05-19.
  • zeptoforth 1.0.0 is out! (Now with optional USB CDC support for the RP2040)
    3 projects | reddit.com/r/Forth | 19 May 2023
    Just a note - if you've downloaded release 1.0.0 already, you will want to download and flash release as it fixes a significant bug in the USB support.
    3 projects | reddit.com/r/Forth | 19 May 2023
    Now that I have added optional USB CDC console support to the RP2040 and RP2040 hardware support is reasonably complete, things like radio chips aside, I figured it was as good a time as ever to declare release 1.0.0. Note that both USB CDC console and serial console support are supported; you will want to flash your Pico (or other RP2040-based board) with bin/1.0.0/rp2040/zeptoforth_full_usb-1.0.0.uf2 if you want USB CDC console support as opposed to serial console support, for which you will want bin/1.0.0/rp2040/zeptoforth_full-1.0.0.uf2.
    3 projects | reddit.com/r/Forth | 19 May 2023
    Patch-level release 1.0.1 is out. This release improves the disassembler, particularly adding the ability to properly disassemble string literals.
  • I'm wondering why so few forth microcontoller tutorials are out there?
    3 projects | reddit.com/r/Forth | 10 May 2023
    This is a definite shameless plug, but I would recommend my zeptoforth - it has strong support for the RP2040 (e.g. the RPi Pico), including peripheral support and support for executing on both cores, and also has support for a number of STM32 platforms, and comes with a range of example code, documentation, and a wiki.
  • Open Source Forth Systems With First Class Preemptive Multitasking?
    2 projects | reddit.com/r/Forth | 2 Jul 2022
    Zeptoforth has this, but it’s for embedded systems. https://github.com/tabemann/zeptoforth
  • which forth do you guys use for normal day to day scripting and programming
    6 projects | reddit.com/r/Forth | 17 Oct 2021
    I am the developer of zeptoforth, which is the main Forth I am using at the present. It supports the RP2040 (particularly the Raspberry Pi Pico, but it should work on other RP2040 boards), which I have been working with lately, and the STM32F407, STM32L476, and STM32F746 DISCOVERY boards. Note that it is not a desktop Forth; for that I would probably just recommend gforth.

What are some alternatives?

When comparing spf and zeptoforth you can also consider the following projects:

durexforth - Modern C64 Forth

gforth - Gforth mirror on GitHub (original is on Savannah)

lbForth - Self-hosting metacompiled Forth, bootstrapping from a few lines of C; targets Linux, Windows, ARM, RISC-V, 68000, PDP-11, asm.js.

r3d4 - r3 programing language for 64 bits Windows/Linux/Mac/Rasberry Pi 4