Microsoft Azure
https://azure.microsoft.com/en-us/pricing/free-trial/
Microsoft issued a server offerings vps free azure with a capacity large enough. you can use it for any purpose. because these servers can install web applications, virtual machines, sql server etc.
Storage capacity: 150GB
RAM capacity: 1.75
The validity period of VPS: 1 Month with a $ 200 credit
You can create more than 4 VPS
Aws Amazon
Amazon Web Services (AWS) Free is designed to allow you to gain experience with AWS Cloud Services. Free AWS includes service with a free level available for 12 months after the date you Register AWS, as well as offering additional services that will not automatically expire at the end of 12 months of probation Amazon AWS Free.
AWS Free Storage Capacity: 5GB
Capacity RAM: 613 MB
Burst RAM: 613 MB
Term: 1 Year
HP cloud
Hp cloud also provides development trial period for 60 days. with a linux based os we can try it for free.
$ 100 credit
90-Day Free VPS
Windows Linux VPS
VMware Horizon Air
VMware Horizon offers 7-day free trial pack for Windows 2008 VPS server packages server specifications that we will get among other things:
CPU Cores 1
2 GB Memory
25 GB Disk Space
Type of OS Windows Server 2008
OpenHosting – https://east1.openhosting.com/accounts/trial/
(5 days free trial)
ElasticHosts – http://www.elastichosts.com/cloud-hosting/free-trial
(5 days free trial)
Cloud Sigma – http://cloudsigma.com/
(7 days free trial)
Desktone Hosting – http://www.desktone.com/free_trial
(7 days free trial)
Skytap trial VPS hosting- https://www.skytap.com/skytap-trial/
Apponfy – https://www.apponfly.com/