---
title: "WordPress Plugins by Serhii Symonov — symonov.com/plugins"
description: "Open-source WordPress plugins focused on doing one thing well: Contact Form 7 validation, Mailtrap email delivery, and more."
url: https://symonov.com/plugins/
---

# Plugins that do one thing well.

Small, focused WordPress plugins for problems we actually run into in client work. No upsells, no admin bloat, no telemetry.

**3** total

● 3 active

● 0 in dev

## stats — what we cover

php: 8.0–8.1+

wordpress: 6.0–7.1.3

since: 2026-05

downloads: via wp.org

## active — shipped on wordpress.org

### [FakturFlow – E-Invoicing for KSeF](https://symonov.com/plugins/fakturflow-ksef/)

v 0.3.0

Issue KSeF structured e-invoices (FA(3)) straight from WooCommerce orders — no intermediaries, no per-invoice fees.

`commerce`

php 8.1+ · wp 6.5+ tested up to wp 7.1.3 active

### [SwiftTrap for Mailtrap](https://symonov.com/plugins/swifttrap-for-mailtrap/)

v 3.0.3

Send WordPress emails through the Mailtrap Email API (not SMTP). Bulk and transactional streams, categories, suppression list, email log.

`email`

php 8.0+ · wp 6.0+ tested up to wp 7.1.3 active

### [Validation Muse for Contact Form 7](https://symonov.com/plugins/validation-muse-for-cf7/)

v 1.7.2

Custom error and required-field messages for Contact Form 7. CF7 6.x SWV-compatible, multilingual via Flavor, no global settings page.

`forms`

php 8.0+ · wp 6.0+ tested up to wp 7.1.3 active

## next on the queue — ideas in the drawer

- cf7 conditional fields // requested 4×
- wp.org review monitor // scratch our own itch
- redis object cache, opinionated // maybe