ALL SOURCES COMBINED

1. Twilio.com 
2. Textnow.com 
3. Countrycode.org 
4. Wp.pinger.com 
5. Textmagic.com 
6. Esendex.co.uk - (It's easy to get a trial period using a virtual number by fast registration, the package includes 25 free messages, the restriction of use in 7 days.No credit card is required.You can be counted for a personal number!) 
7. Burstsms.com.au - (Similar service as the previous one, fast registration, the probe includes 14 days You do not need a credit card, so you can count as a personal number!) 
8. Directsms.com.au - (You register, you get a free 30-day trial version Business sms. Personal Wirth.number!)
9. Vumber.com - (Register, receive a 14-day trial version.) Personal