Spreadsheet of Past & Upcoming Funding Opportunities (continuously updated) - this is not an exhaustive list, but will hopefully give you some good leads on grant opportunities relevant to your interests.
English Language Writing Training (University of Sheffield, UK) - free online English writing training
NonProfitReady Website - free simple grant writing training
FundsforNGOs Website - free resource for tracking funding opportunities
Tearfund Project cycle management Roots guide - an excellent resource on project planning and management
Change The Game Academy - free, localised resources on resourcing.
USAID "How to Work with USAID" Training Modules
USAID Partner Directory - register your organization if you are interested in working with USAID and want to connect with potential partners
DEVEX - International Development news site with a searchable section on funding opportunities
How to Build Community podcast - a monthly podcast from Arukah Network and TearFund with inspiring stories of community development projects
INDIKIT - interactive site designed to help humanitarian and development workers identify and use well-formulated project indicators.
BetterEvaluation - excellent knowledge sharing platform, sharing lots of great ideas and tools for effective monitoring and evaluation.
Humentum Financial management essentials: Handbook for NGOs (also known as the Mango Handbook for NGOs) - excellent free resource on budgeting and financial management.
RBM Handbook on Developing Results Chains - a helpful resource from the Canadian International Development Agency. In particular see pages 34-134 which list examples of completed RBM plans. Warning - these are not all set out exactly as we laid out in the training, and the resource is from 2000, but still provide some helpful examples.
10 Tips for writing better project proposals - a good summary of lots of the key points we've covered during our training and a helpful reminder of things to be thinking about when writing future proposals.