lighttpd is a secure, fast, compliant, and very flexible Web server which has been optimized for high-performance environments. It has a very low memory footprint compared to other Web servers, and it takes care of CPU load. It has an advanced feature set that includes FastCGI (load balanced), CGI, Auth, Output-Compression, URL-Rewriting, SSL, and much more.
ModLogAn is a modular logfile analyzer that combines speed with flexibility. It parses the logfiles generated by several server-types (HTTP, FTP, mail, streaming, etc.) and other logfile sources (flow-tools, ipchains, PABXs): currently 24 parsers. It features incremental logfile processing and internal resolving, and is able the split (mass-hosting) and combine logfiles (clusters) internally. The output can be based on the internal template engine to generate your own look & feel.