What are some alternatives?
When comparing Cloudtrek and PostGIS, you can also consider the following products
Rackspace - More than 100,000 businesses trust Rackspace with their hosting and cloud computing. Get cloud, managed and hybrid hosting all backed by Fanatical Support.
Sequel Pro - MySQL database management for Mac OS X
Cloudant - A scalable JSON document database for web, mobile, IoT and serverless applications.
DataGrip - Tool for SQL and databases
AWS - Amazon Web Services offers reliable, scalable, and inexpensive cloud computing services. Free to join, pay only for what you use.
Slick - A jquery plugin for creating slideshows and carousels into your webpage.