IDE & Tasks Lists ~ Cross Platform

Hi all, We run CentOS on our servers and our dev machines are Linux or Windows (and probably a Mac somewhere but we don't like to talk about that guy!) We have grown quite a bit and having each dev running their pet dev environment seems eclectic and difficult to manage (aka manage down when you need to help a colleague and it take you 5 minutes to work out how their IDE / screen is working). I use The Eclipse for PHP IDE and one of the functions I like about it is /** @todo ... **/ creates a task and this task can be managed on some central service providers. I am seeking advice about cross platform IDE's that work well with shared tasks. Ideally something that can import messages from GMail as tasks would be great (I see another plugin that does this in Eclipse). It doesn't have to be Eclipse but the main aim is to manage individual coding tasks better. If we can get some metrics from a management point of view that would be great. If a platform can support multiple IDE's efficiently then great. Currently we use FreshDesk as out KB platform. Any ideas appreciated (as are rants/feedback) Have a great weekend. Thanks Piers