What do you use for version / source control?

I’ve had an email from a reader, Nigel, this morning asking about version and source control services:

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Hi Ewan,

Can you tell me what services you recommend for version / source control of software. We’re looking for a hosted service that will allow our developers to collaborate with each other, check-in/check-out files and so on. Do you have any ideas?

Thanks
Nigel

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What does the mobile industry use for source control then? There must be some good hosted environments for this kind of thing. I did a search and found Dynamsoft’s SourceSafe system — looks rather nifty. Have a look at that one, Nigel.

Any other suggestions?