SADEV, the Swedish Agency for Development Evaluation maintains a database with time series data on Swedish bi- and multilateral aid allocation. The task to make sense of the development aid data is a difficult one.
Which countries have received most, which sectors are biggest, and how much within a country went to different sectors, such as education or health? You also want to I know see how much aid was distributed through the different multilateral organizations.
To get things started Gapminder put the data from Sadev into a few different visualization tools.
See the result in Gapminder Labs Visualizing Swedish development aid