I have developed the following modules:

Tab Manager
- Enables to hide, reorder and rename tabs (local task links).

Field IP address PostgreSQL
- Provides field types that are stored and processed as the PostgreSQL Network Address Types.

Webform HTML notes
- Enables to use HTML and available text formats to enter notes about webform submissions.

Paragraphs unpublished by default
- Enables to make newly created paragraphs unpublished by default.

Views Highlight Past Events
- Provides a user interface that enables to highlight past events displayed with the Views module.

Views alias filter
- Provides exposed filter to filtering nodes by URL aliases.

Video duration formatter
- The formatter to display the duration of uploaded videos.

Restricted img sources filter
- Provides the text filter to allow restricted usage of <img> tag sources that are not hosted on this site (you need to create a whitelist of allowed hosts).

Views user input field
- Provides the Views field which enables to collect user input from HTML form, Webform or exposed filter. Then this data can be used in calculations along with data from other fields.

Rules link field
- The module allows to create links that run rules.

Contact author
- Provides the block with the link to open a contact form of a node author in off-canvas dialog.

Views PDF Merger
- Enables to generate a PDF from a View and merge it with a referenced PDF.

Image field to media
- Helps convert existing image fields to Media fields.

Webform unsubscribe
- provides [webform_submission:delete-url] token that enables to create the link for removing a webform submission. The link can be sent via email to a user that can be anonymous.

Webform notify draft authors
- enables to collect email addresses of users who saved drafts and notify them when a webform will be completed and submitted.

Webform send draft link
- Enables to send a link to a webform draft via email.

Rules Webform
- provides integration of 'Rules' and 'Webform' modules for Drupal 8.

G&G Pushcast
- integration with the G&G Pushcast push notifications service.

openweathermap.org
- integration with the openweathermap.org service.

Age exposed filter
- the exposed filter that enables to filter a view's data by age.

Rules Data Exchanger
- enables to exchange data between Rules and rules Components in Drupal 8. It's allows to store any data of a some Rule and then use them in others Rules or Components.

Rules User Fields
- extends the 'Rules' module for Drupal 8. Today the 'Rules' module has the following restriction:
If you create a new 'User' in a 'Rule' then you can't get access to its custom fields in this 'Rule'. This module helps to solve this problem.

Rules Send Big Email
- Replace the 'text field' for entering email message with the multi row 'textarea' field.

Rules Token
- extends the 'Rules' module for Drupal 8. Enables to use in Rules tokens provided by: 'Token', 'Custom Tokens' and 'Custom Tokens Plus' modules. It allows getting values of any Drupal data and use them in Rules.

Display Selected and Unselected
- provides the field formatters to display all selected and unselected values of a list field. The module supports the following field types: List (text), List (float), List (integer).

Remove Trailing Zeros
- provides formatter that remove trailing zeros in decimal and float fields.

Media Tracker
- Enables to count how many times media files has been played.

Mail notify
- Enables to notify users with specific roles about content updates via email.

Hotkeys for Save
- speeds up the work with Drupal by enabling to use hotkeys Ctrl+S (Win) and Cmd+S (Mac) instead of clicking on 'Save' buttons, such as:
'Save block', 'Continue', 'Save permissions', 'Create new ccount', 'Finish', 'Continue & edit', 'Save and edit', 'Save and continue', 'Save and manage fields', 'Save configuration' and etc.

Drupal events:

Drupal GovCon 2020