Regular expensive VPS providers list

Namecheap: They aren't just for domain names. Smallest plan: 20 USD / month 512 MB Xen VPS. They provide unmanaged, semi-managed, fully-managed service.
Site5: Smallest plan 25 USD / month 1 GB Xen VPS. They also have fully-managed service.

See also VPS providers list.

Useful sites

Useful sites:

• ServerBear: Benchmarks for VPS + Dedicated servers + Shared hosting.  Awesome work there!
• Low End Box: Low end VPS offers, The original low end VPS offers site
• LowEndTalk: Discussions & offers,
• Web Hosting Talk: Needs no introduction, the biggest, oldest web hosting forum(s)

Regular affordable VPS providers list

• RamNode: Solid service you can depend on them.
• BuyVM: Have a very nice feature: offloaded MySQL for 1 USD/month.
• Prometeus: See more information here.

See also VPS providers

VPS providers list

On VPS Ahead:

• Cloud VPS providers list
• Regular affordable VPS providers list
• Regular premium VPS providers list  

Elsewhere:

•  VPS comparison table from Cryto.net

Cloud VPS providers list

• Digital Ocean: See Should I use Digital Ocean VPS?
• Vultr: Like Digital Ocean but its starter plan has extra RAM (768 MB vs 512 MB)
• SeFlow: Two models, CloudFlow and CloudOne, CloudOne is like Digital Ocean but it has a flat monthly rate, not hourly.
• Linode: Smallest plan is 10 USD (1GB RAM), No PayPal support, been around for a long while.
• iwStack:

See also VPS providers