A Rocha are an environmental Christian organisation.
Afrinspire are an aid charity I've helped with.
Christians Against Poverty is a Christian organisation helping with financial challenges.
Christian Guild Holidays run several hotels in the UK with themed weeks.
Genr8 take the gospel messages into schools.
OMF is an East Asia mission.
Quiet Waters is a very welcoming retreat place.
Scripture Union do good schools work.
Spring Harvest is an event held at Easter, worth going to once.