This project draws together various sources (primary and secondary) into one handy scholarly place for all students of literature to examine. This site specializes in nineteenth century writers but the software that runs it, Collex, can be used to create any collection. This freeware appears to
1. Work within any browser
2. Use no plugins so is self-contained
3. Be free and busy with developers working to improve it.
Here are a few collections to check out.