Aws Quick Architecture Blueprints Editable Easy Tools
Through my previous experience in addressing various problem statements , ideas & cloud cost problems, i want to generalize the basic architecture for digitization . This can be B2C or B2B applications with SaaS model. Also , want to list down the basic checklist required for building the scalable applications.
Architecture View.
Generic Architecture Diagrams.
AWS Three Tier model - Scalable and Secure Networking model for Large Scale apps

AWS Elastic Load Balancer Networking flow.

AWS Varnish Deployment Model.

Downloadable & Editable Source files - gliffy
https://github.com/cnuonline/cnuonline.github.io/tree/master/gliffy
Apart from that, few of the frequently used tools with Freemium model and ready to kickstart your work.
CheckList for starting the app Dev
Domain Name
DNS mapping & Access
VPS server procurement & Access
Certificate procurement & Access
Code versioning - Bitbucket.org
Transactional Email & Access https://MailGun.com
Transactional SMS & Access https://BhashSMS.com
GCM - Google Cloud Messaging for PushNotifications. Firebase access
Analytics - Google Analytics access
Alerts & Notifications for Server Maintainence.
Jenkins - Continuous Deployment
CRM setup - https://www.opalcrm.com
Ticket Management System - https://OSTicket.com
Project Management - JIRA stories - https://bitbucket.org
Tools for discovery, analysis and building blocks
SOA - API Design YAML Designing tool for Restful Services http://openapi.design
Client SDK Generation tools - https://raml.org/projects
Chat & Discussion - https://Slack.com
Procuring Domain - https://GoDaddy.com
DNS Management - https://CloudFlare.com
Virtual Private Machine - VPS - https://OVH.com
Microservices Gateway - https://Konghq.com
Options to install OAuth 2.0 plugin for managing the list of Consumers/Applications to access the data.
Campaign Management with workflow - https://MailChimp.com https://trello.com
List will be growing and try keep them updated