Merge branch 'master' into patch-1

README.md

@@ -191,9 +191,11 @@ Table of Contents
   * [Igloo](https://www.igloosoftware.com/) — Internal portal for sharing documents, blogs and calendars etc. Free for up to 10 users.
   * [riot.im](https://about.riot.im/) — A decentralized communication tool built on Matrix. Group chats, direct messaging, encrypted file transfers, voice and video chats, and easy integration with other services.
   * [Microsoft Teams](https://products.office.com/microsoft-teams/free) — Microsoft Teams is a chat-based digital hub that brings conversations, content, and apps together in one place all from a single experience. Free for up to 300 users.
+  * [featurepeek.com](https://featurepeek.com) - Cloud provider-agnostic front-end feature environments with team collaboration tools built-in. Works with static and Dockerized front-ends. Free for public repositories.
 
 ## Code Quality
 
+  * [hiberly.com](https://hiberly.com) - Tech debt toolkit for developers - grabs feedback from engineers after each merge, then aggregates this to quantify and highlight tech debt in the codebase. Free for use in retrospectives for up to 12 months.
   * [tachikoma.io](https://tachikoma.io/) — Dependency Update for Ruby, Node.js, Perl projects, free for Open Source
   * [landscape.io](https://landscape.io/) — Code Quality for Python projects, free for Open Source
   * [codeclimate.com](https://codeclimate.com/) — Automated code review, free for Open Source and unlimited organisation-owned private repos (upto 4 collaboraters). Also free for students and institutions.
@@ -251,6 +253,7 @@ Table of Contents
 
   * [gridlastic.com](https://www.gridlastic.com/) — Selenium Grid testing with free plan up to 4 simultaneous selenium nodes/10 grid starts/4,000 test minutes/month
   * [saucelabs.com](https://saucelabs.com/) — Cross browser testing, Selenium testing and mobile testing, [free for Open Source](https://saucelabs.com/open-source)
+  * [crossbrowsertesting.com](https://crossbrowsertesting.com) - Manual, Visual, and Selenium Browser Testing in the cloud - [free for Open Source](https://crossbrowsertesting.com/open-source)
   * [browserstack.com](https://www.browserstack.com/) — Manual and automated browser testing, [free for Open Source](https://www.browserstack.com/open-source?ref=pricing)
   * [everystep-automation.com](https://www.everystep-automation.com/) — Records and replays all steps made in a web browser and creates scripts,... free with fewer options
   * [Applitools.com](https://applitools.com/) — smart visual validation for web, native mobile and desktop apps. Integrates with almost all automation solutions (like Selenium and Karma) and remote runners (Sauce Labs, Browser Stack). free for open source. A free tier for a single user with limited checkpoints per week.
@@ -396,6 +399,7 @@ Table of Contents
   * [testmail.app](https://testmail.app/) - Automate end-to-end email tests with unlimited mailboxes and a GraphQL API. 100 emails/month free forever, unlimited free for open source.
   * [trashmail.com](https://www.trashmail.com) - Free disposable email addresses with forwarding and automatic address expiration
   * [Sender](https://www.sender.net) Up to 15 000 emails/month - Up to 2 500 subscribers
+  * [Buttondown](https://buttondown.email/) — Newsletter service. Up to 1,000 subscribers free
 
 ## CDN and Protection
 
@@ -431,7 +435,7 @@ Table of Contents
   * [mendix.com](https://www.mendix.com/) — Rapid Application Development for Enterprises, unlimited number of free sandbox environments supporting 10 users, 100 MB of files and 100 MB database storage each
   * [pythonanywhere.com](https://www.pythonanywhere.com/) — Cloud Python app hosting. Beginner account is free, 1 Python web application at your-username.pythonanywhere.com domain, 512 MB private file storage, one MySQL database
   * [configure.it](https://www.configure.it/) — Mobile app development platform, free for 2 projects, limited features but no resource limits
-  * [zeit.co/now](https://zeit.co/now) — Managed platform for Node.js, static sites and Docker deployments. Limited to 3 concurrent instances, 1 GB storage and 1 GB bandwidth for OSS projects (source files are exposed on a public URL)
+  * [zeit.co/now](https://zeit.co/now) — Serverless platform with support for multiple languages (including static sites) and single command deployment. Free tier includes SSL, 20GB bandwidth, 100 deployments.
   * [sandstorm.io](https://sandstorm.io/) — Sandstorm is an open source operating system for personal and private clouds. Free plan offers 200 MB storage and 5 grains free
   * [gearhost.com](https://www.gearhost.com/pricing) — Platform for .NET and PHP apps. 256 MB of RAM for free on a shared server with limited resources
   * [glitch.com](https://glitch.com/) — Free unlimited public/private hosting with features such as code sharing and real-time collaboration
@@ -463,6 +467,7 @@ Table of Contents
   * [posthook.io](https://posthook.io/) — Job Scheduling Service. Allows you to schedule requests for specific times. 500 scheduled requests/month free.
   * [paraio.com](https://paraio.com) — Backend service API with flexible authentication, full-text search and caching. Free for 1 app, 1GB app data.
   * [remotemysql.com](https://remotemysql.com) — Remote MySQL Database hosting, setup is instant and use phpMyAdmin for administration, free for 100Mb data, free backups, no query limits and 99% uptime.
+  * [ably.com](https://www.ably.com) - APIs for realtime messaging, push notifications, and event-driven API creation. Free plan has 3m messages/mo, 100 concurrent connections, 100 concurrent channels.
 
 ## Web Hosting
 
@@ -475,7 +480,7 @@ Table of Contents
   * [acquia.com](https://www.acquia.com/) — Hosting for Drupal sites. Free tier for developers. Free development tools (such as Acquia Dev Desktop) also available
   * [readthedocs.org](https://readthedocs.org/) — Free documentation hosting with versioning, PDF generation and more
   * [bubble.is](https://bubble.is/) — Visual programming to build web and mobile apps without code, free 100 visitors/month, 2 apps
-  * [contentful.com](https://www.contentful.com/) — Content as a Service. Content management and delivery APIs in the cloud. 3 users, 3 repositories and 100,000 API requests/month for free
+  * [contentful.com](https://www.contentful.com/) — Headless CMS. Content management and delivery APIs in the cloud. Comes with one free micro space that includes 10 users, 5000 records, 24 Content Types, 2 locales.
   * [tilda.cc](https://tilda.cc/) — One site, 50 pages, 50 MB storage, only the main pre-defined blocks among 170+ available, no fonts, no favicon and no custom domain
   * [surge.sh](https://surge.sh/) — Static web publishing for Front-End developers. Unlimited sites with custom domain support
   * [neocities.org](https://neocities.org) — Static, 1 GB free storage with 200 GB Bandwidth.
@@ -632,6 +637,7 @@ Table of Contents
    * [osmnames](https://osmnames.org/) — Geocoding, search results ranked by the popularity of related Wikipedia page
    * [maptiler.com](https://www.maptiler.com/cloud/) — Vector maps, map services and SDKs for map visualisation. Free vector tiles with weekly update and four map styles.
    * [here](https://developer.here.com/) — APIs and SDKs for maps and location-aware apps. 250k transactions/month for free.
+   * [developers.arcgis.com](https://developers.arcgis.com) — APIs and SDKs for maps, geospatial data storage, analysis, geocoding, routing, and more across web, desktop, and mobile. 1,000,000 free basemap+geocode transactions, 40GB free tile+data storage per month.
 
 ## Package Build System
 
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 ## Payment / Billing Integration
 
-  * [braintreepayments.com](https://www.braintreepayments.com/) — Credit Card, Paypal, Venmo, Bitcoin, Apple Pay,... integration. Single and Recurrent Payments. First USD 50,000 free
   * [currencylayer.com](https://currencylayer.com/) — Reliable Exchange Rates and Currency Conversion for your Business, 1,000 API requests/month free
   * [vatlayer.com](https://vatlayer.com/) — Instant VAT number validation and EU VAT rates API, free 100 API requests/month
   * [fraudlabspro.com](https://www.fraudlabspro.com) — Help merchants to prevent payment fraud and chargebacks. Free Micro Plan available with 500 queries/month.