petro64

Plugin to trigger <a href="https://instantview.telegram.org/" rel="nofollow ugc">Telegram Instant View</a> for all Blog posts.
Principal: it detects Telegram bot and returns special template for posts, to trigger Instant View.
<ul>
<li>No template submitting required.</li>
<li>No special links required.</li>
<li>Compatable with any cross-posting systems.</li>
</ul>
Original Telegram InstantView templates registry appears to be dead, my template was not reviewed and submitted in over 1 year. This plugin solves this issue server-side.
<a href="https://t.me/petro_ws" rel="nofollow ugc">My telegram channel with plugin active</a>.
<a href="https://github.com/petrows/wp-tg-instantview" rel="nofollow ugc">Project sources on Github</a> (please submit issues there).

TG-InstantView

This plugin triggers Telegram Instantvew for all posts, no special links required.

iTRON

This plugin allows to send Contact Form 7 messages to your Telegram-chat. For this you need to make several simple steps.
<ol>
<li>Create the Telegram-Bot and save the Bot-Token parameter on the settings page Contact Form 7 – CF7 Telegram or to <code>WPFC7TG_BOT_TOKEN</code> constant.</li>
<li>Paste the shortcode <code>[telegram]</code> in your contact form template for activate sending to Telegram.</li>
</ol>
Now you can to add users or group to subscriber list. 
To add a user send the <code>/cf7tg_start</code> command to your bot. 
To add a group add your bot to the group and send the <code>/cf7tg_start</code> command to your group.
After this, you will see the requests on the Contact Form 7 – CF7 Telegram settings page. Approve or decline them.
<h4>Hooks and constants</h4>
Filter <code>wpcf7tg_skip_tg</code>. 
Use for skipping sending message.
Filter <code>wpcf7tg_markdown</code>. 
Use for customizing markdown tag set.
Constant <code>WPFC7TG_BOT_TOKEN</code>. 
Use for define the bot token value in the program files.
This plugin uses <a href="https://core.telegram.org/api" title="Telegram docs" rel="nofollow ugc">API Telegram</a> and makes remote HTTP-requests to Telegram servers for sending your notifications.

Contact Form 7 + Telegram

The best plugin to connect your CF7 form to Telegram. This is a lightweight plugin that also parse your HTML tags into markdown to format well done the output messages. 

Good job! 

A lightweight plugin to connect CF7 to Telegram

This plugin allows to post CF7-messages to you through Telegram-bot. Just use shortcode [telegram] in your CF7-form.

TG-InstantView vs Contact Form 7 + Telegram